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Finding the Fourth Proportional to 15,127.88, 20,874.66 and 8,411.82

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Solution

The fourth proportional to 15,127.88, 20,874.66 and 8,411.82 is: 11,607.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,127.88 : 20,874.66 = 8,411.82 : x
  2. Step 2: Convert to fraction form
    15,127.88/20,874.66 = 8,411.82/x
  3. Step 3: Cross multiply
    15,127.88x = 20,874.66 × 8,411.82
  4. Step 4: Simplify right side
    15,127.88x = 175,593,882.48
  5. Step 5: Solve for x
    x = 175,593,882.48/15,127.88
  6. Step 6: Final answer
    x = 11,607.30

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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.