Home / 15,724.38-21,700.08-8,650.74

Finding the Fourth Proportional to 15,724.38, 21,700.08 and 8,650.74

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Solution

The fourth proportional to 15,724.38, 21,700.08 and 8,650.74 is: 11,938.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.38 : 21,700.08 = 8,650.74 : x
  2. Step 2: Convert to fraction form
    15,724.38/21,700.08 = 8,650.74/x
  3. Step 3: Cross multiply
    15,724.38x = 21,700.08 × 8,650.74
  4. Step 4: Simplify right side
    15,724.38x = 187,721,750.06
  5. Step 5: Solve for x
    x = 187,721,750.06/15,724.38
  6. Step 6: Final answer
    x = 11,938.26

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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.