Home / 15,528.32-21,428.42-8,454.76

Finding the Fourth Proportional to 15,528.32, 21,428.42 and 8,454.76

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Solution

The fourth proportional to 15,528.32, 21,428.42 and 8,454.76 is: 11,667.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.32 : 21,428.42 = 8,454.76 : x
  2. Step 2: Convert to fraction form
    15,528.32/21,428.42 = 8,454.76/x
  3. Step 3: Cross multiply
    15,528.32x = 21,428.42 × 8,454.76
  4. Step 4: Simplify right side
    15,528.32x = 181,172,148.28
  5. Step 5: Solve for x
    x = 181,172,148.28/15,528.32
  6. Step 6: Final answer
    x = 11,667.21

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Find fourth proportional to 7,764.16, 10,714.21 and 4,227.38
Half scale
Find fourth proportional to 31,056.64, 42,856.84 and 16,909.52
Double scale
Find fourth proportional to 15,529.32, 21,429.80 and 8,455.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.