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Finding the Fourth Proportional to 18,884.90, 28,343.55 and 8,371.10

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Solution

The fourth proportional to 18,884.90, 28,343.55 and 8,371.10 is: 12,563.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,884.90 : 28,343.55 = 8,371.10 : x
  2. Step 2: Convert to fraction form
    18,884.90/28,343.55 = 8,371.10/x
  3. Step 3: Cross multiply
    18,884.90x = 28,343.55 × 8,371.10
  4. Step 4: Simplify right side
    18,884.90x = 237,266,691.41
  5. Step 5: Solve for x
    x = 237,266,691.41/18,884.90
  6. Step 6: Final answer
    x = 12,563.83

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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.