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Finding the Fourth Proportional to 15,149.97, 20,909.48 and 8,775.47

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Solution

The fourth proportional to 15,149.97, 20,909.48 and 8,775.47 is: 12,111.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,149.97 : 20,909.48 = 8,775.47 : x
  2. Step 2: Convert to fraction form
    15,149.97/20,909.48 = 8,775.47/x
  3. Step 3: Cross multiply
    15,149.97x = 20,909.48 × 8,775.47
  4. Step 4: Simplify right side
    15,149.97x = 183,490,522.85
  5. Step 5: Solve for x
    x = 183,490,522.85/15,149.97
  6. Step 6: Final answer
    x = 12,111.61

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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.