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Finding the Fourth Proportional to 18,757.38, 28,127.87 and 8,899.47

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Solution

The fourth proportional to 18,757.38, 28,127.87 and 8,899.47 is: 13,345.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.38 : 28,127.87 = 8,899.47 : x
  2. Step 2: Convert to fraction form
    18,757.38/28,127.87 = 8,899.47/x
  3. Step 3: Cross multiply
    18,757.38x = 28,127.87 × 8,899.47
  4. Step 4: Simplify right side
    18,757.38x = 250,323,090.73
  5. Step 5: Solve for x
    x = 250,323,090.73/18,757.38
  6. Step 6: Final answer
    x = 13,345.31

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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.