Home / 15,729.28-21,707.92-8,657.04

Finding the Fourth Proportional to 15,729.28, 21,707.92 and 8,657.04

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Solution

The fourth proportional to 15,729.28, 21,707.92 and 8,657.04 is: 11,947.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.28 : 21,707.92 = 8,657.04 : x
  2. Step 2: Convert to fraction form
    15,729.28/21,707.92 = 8,657.04/x
  3. Step 3: Cross multiply
    15,729.28x = 21,707.92 × 8,657.04
  4. Step 4: Simplify right side
    15,729.28x = 187,926,331.76
  5. Step 5: Solve for x
    x = 187,926,331.76/15,729.28
  6. Step 6: Final answer
    x = 11,947.55

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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.