Home / 15,396.40-21,246.90-8,322.76

Finding the Fourth Proportional to 15,396.40, 21,246.90 and 8,322.76

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Solution

The fourth proportional to 15,396.40, 21,246.90 and 8,322.76 is: 11,485.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,396.40 : 21,246.90 = 8,322.76 : x
  2. Step 2: Convert to fraction form
    15,396.40/21,246.90 = 8,322.76/x
  3. Step 3: Cross multiply
    15,396.40x = 21,246.90 × 8,322.76
  4. Step 4: Simplify right side
    15,396.40x = 176,832,849.44
  5. Step 5: Solve for x
    x = 176,832,849.44/15,396.40
  6. Step 6: Final answer
    x = 11,485.34

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Find fourth proportional to 7,698.20, 10,623.45 and 4,161.38
Half scale
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Double scale
Find fourth proportional to 15,397.40, 21,248.28 and 8,323.76
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.