Home / 15,685.92-21,641.25-8,966.79

Finding the Fourth Proportional to 15,685.92, 21,641.25 and 8,966.79

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Solution

The fourth proportional to 15,685.92, 21,641.25 and 8,966.79 is: 12,371.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.92 : 21,641.25 = 8,966.79 : x
  2. Step 2: Convert to fraction form
    15,685.92/21,641.25 = 8,966.79/x
  3. Step 3: Cross multiply
    15,685.92x = 21,641.25 × 8,966.79
  4. Step 4: Simplify right side
    15,685.92x = 194,052,577.71
  5. Step 5: Solve for x
    x = 194,052,577.71/15,685.92
  6. Step 6: Final answer
    x = 12,371.13

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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.