Home / 15,715.22-21,687.42-8,545.61

Finding the Fourth Proportional to 15,715.22, 21,687.42 and 8,545.61

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Solution

The fourth proportional to 15,715.22, 21,687.42 and 8,545.61 is: 11,793.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.22 : 21,687.42 = 8,545.61 : x
  2. Step 2: Convert to fraction form
    15,715.22/21,687.42 = 8,545.61/x
  3. Step 3: Cross multiply
    15,715.22x = 21,687.42 × 8,545.61
  4. Step 4: Simplify right side
    15,715.22x = 185,332,124.79
  5. Step 5: Solve for x
    x = 185,332,124.79/15,715.22
  6. Step 6: Final answer
    x = 11,793.17

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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.