Home / 15,552.32-21,462.20-8,478.76

Finding the Fourth Proportional to 15,552.32, 21,462.20 and 8,478.76

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Solution

The fourth proportional to 15,552.32, 21,462.20 and 8,478.76 is: 11,700.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,552.32 : 21,462.20 = 8,478.76 : x
  2. Step 2: Convert to fraction form
    15,552.32/21,462.20 = 8,478.76/x
  3. Step 3: Cross multiply
    15,552.32x = 21,462.20 × 8,478.76
  4. Step 4: Simplify right side
    15,552.32x = 181,972,842.87
  5. Step 5: Solve for x
    x = 181,972,842.87/15,552.32
  6. Step 6: Final answer
    x = 11,700.69

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Find fourth proportional to 7,776.16, 10,731.10 and 4,239.38
Half scale
Find fourth proportional to 31,104.64, 42,924.40 and 16,957.52
Double scale
Find fourth proportional to 15,553.32, 21,463.58 and 8,479.76
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.