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Finding the Fourth Proportional to 15,102.90, 20,841.66 and 8,388.14

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Solution

The fourth proportional to 15,102.90, 20,841.66 and 8,388.14 is: 11,575.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,102.90 : 20,841.66 = 8,388.14 : x
  2. Step 2: Convert to fraction form
    15,102.90/20,841.66 = 8,388.14/x
  3. Step 3: Cross multiply
    15,102.90x = 20,841.66 × 8,388.14
  4. Step 4: Simplify right side
    15,102.90x = 174,822,761.91
  5. Step 5: Solve for x
    x = 174,822,761.91/15,102.90
  6. Step 6: Final answer
    x = 11,575.44

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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.