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Finding the Fourth Proportional to 18,884.80, 28,314.87 and 10,565.74

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Solution

The fourth proportional to 18,884.80, 28,314.87 and 10,565.74 is: 15,841.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,884.80 : 28,314.87 = 10,565.74 : x
  2. Step 2: Convert to fraction form
    18,884.80/28,314.87 = 10,565.74/x
  3. Step 3: Cross multiply
    18,884.80x = 28,314.87 × 10,565.74
  4. Step 4: Simplify right side
    18,884.80x = 299,167,554.55
  5. Step 5: Solve for x
    x = 299,167,554.55/18,884.80
  6. Step 6: Final answer
    x = 15,841.71

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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.