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Finding the Fourth Proportional to 15,115.83, 20,859.17 and 8,401.43

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Solution

The fourth proportional to 15,115.83, 20,859.17 and 8,401.43 is: 11,593.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.83 : 20,859.17 = 8,401.43 : x
  2. Step 2: Convert to fraction form
    15,115.83/20,859.17 = 8,401.43/x
  3. Step 3: Cross multiply
    15,115.83x = 20,859.17 × 8,401.43
  4. Step 4: Simplify right side
    15,115.83x = 175,246,710.31
  5. Step 5: Solve for x
    x = 175,246,710.31/15,115.83
  6. Step 6: Final answer
    x = 11,593.59

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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.