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Finding the Fourth Proportional to 15,006.61, 20,708.89 and 8,292.11

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Solution

The fourth proportional to 15,006.61, 20,708.89 and 8,292.11 is: 11,442.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,006.61 : 20,708.89 = 8,292.11 : x
  2. Step 2: Convert to fraction form
    15,006.61/20,708.89 = 8,292.11/x
  3. Step 3: Cross multiply
    15,006.61x = 20,708.89 × 8,292.11
  4. Step 4: Simplify right side
    15,006.61x = 171,720,424.90
  5. Step 5: Solve for x
    x = 171,720,424.90/15,006.61
  6. Step 6: Final answer
    x = 11,442.99

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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.