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Finding the Fourth Proportional to 21,432.74, 29,545.74 and 15,039.98

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Solution

The fourth proportional to 21,432.74, 29,545.74 and 15,039.98 is: 20,733.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,432.74 : 29,545.74 = 15,039.98 : x
  2. Step 2: Convert to fraction form
    21,432.74/29,545.74 = 15,039.98/x
  3. Step 3: Cross multiply
    21,432.74x = 29,545.74 × 15,039.98
  4. Step 4: Simplify right side
    21,432.74x = 444,367,338.69
  5. Step 5: Solve for x
    x = 444,367,338.69/21,432.74
  6. Step 6: Final answer
    x = 20,733.11

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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.