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Finding the Fourth Proportional to 18,712.26, 28,074.48 and 12,497.52

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Solution

The fourth proportional to 18,712.26, 28,074.48 and 12,497.52 is: 18,750.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.26 : 28,074.48 = 12,497.52 : x
  2. Step 2: Convert to fraction form
    18,712.26/28,074.48 = 12,497.52/x
  3. Step 3: Cross multiply
    18,712.26x = 28,074.48 × 12,497.52
  4. Step 4: Simplify right side
    18,712.26x = 350,861,375.29
  5. Step 5: Solve for x
    x = 350,861,375.29/18,712.26
  6. Step 6: Final answer
    x = 18,750.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.