Home / 20,728.17-31,087.89-6,689.52

Finding the Fourth Proportional to 20,728.17, 31,087.89 and 6,689.52

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Solution

The fourth proportional to 20,728.17, 31,087.89 and 6,689.52 is: 10,032.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.17 : 31,087.89 = 6,689.52 : x
  2. Step 2: Convert to fraction form
    20,728.17/31,087.89 = 6,689.52/x
  3. Step 3: Cross multiply
    20,728.17x = 31,087.89 × 6,689.52
  4. Step 4: Simplify right side
    20,728.17x = 207,963,061.91
  5. Step 5: Solve for x
    x = 207,963,061.91/20,728.17
  6. Step 6: Final answer
    x = 10,032.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.