Home / 13,126.38-18,108.15-8,878.92

Finding the Fourth Proportional to 13,126.38, 18,108.15 and 8,878.92

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Solution

The fourth proportional to 13,126.38, 18,108.15 and 8,878.92 is: 12,248.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.38 : 18,108.15 = 8,878.92 : x
  2. Step 2: Convert to fraction form
    13,126.38/18,108.15 = 8,878.92/x
  3. Step 3: Cross multiply
    13,126.38x = 18,108.15 × 8,878.92
  4. Step 4: Simplify right side
    13,126.38x = 160,780,815.20
  5. Step 5: Solve for x
    x = 160,780,815.20/13,126.38
  6. Step 6: Final answer
    x = 12,248.68

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Half scale
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Double scale
Find fourth proportional to 13,127.38, 18,109.53 and 8,879.92
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.