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Finding the Fourth Proportional to 18,508.86, 27,759.42 and 8,652.78

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Solution

The fourth proportional to 18,508.86, 27,759.42 and 8,652.78 is: 12,977.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,508.86 : 27,759.42 = 8,652.78 : x
  2. Step 2: Convert to fraction form
    18,508.86/27,759.42 = 8,652.78/x
  3. Step 3: Cross multiply
    18,508.86x = 27,759.42 × 8,652.78
  4. Step 4: Simplify right side
    18,508.86x = 240,196,154.19
  5. Step 5: Solve for x
    x = 240,196,154.19/18,508.86
  6. Step 6: Final answer
    x = 12,977.36

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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.