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Finding the Fourth Proportional to 15,034.69, 20,734.17 and 12,909.56

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Solution

The fourth proportional to 15,034.69, 20,734.17 and 12,909.56 is: 17,803.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,034.69 : 20,734.17 = 12,909.56 : x
  2. Step 2: Convert to fraction form
    15,034.69/20,734.17 = 12,909.56/x
  3. Step 3: Cross multiply
    15,034.69x = 20,734.17 × 12,909.56
  4. Step 4: Simplify right side
    15,034.69x = 267,668,843.45
  5. Step 5: Solve for x
    x = 267,668,843.45/15,034.69
  6. Step 6: Final answer
    x = 17,803.42

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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.