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Finding the Fourth Proportional to 15,149.22, 20,905.20 and 9,180.52

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Solution

The fourth proportional to 15,149.22, 20,905.20 and 9,180.52 is: 12,668.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,149.22 : 20,905.20 = 9,180.52 : x
  2. Step 2: Convert to fraction form
    15,149.22/20,905.20 = 9,180.52/x
  3. Step 3: Cross multiply
    15,149.22x = 20,905.20 × 9,180.52
  4. Step 4: Simplify right side
    15,149.22x = 191,920,606.70
  5. Step 5: Solve for x
    x = 191,920,606.70/15,149.22
  6. Step 6: Final answer
    x = 12,668.68

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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.