Home / 15,129.38-20,881.60-8,755.09

Finding the Fourth Proportional to 15,129.38, 20,881.60 and 8,755.09

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Solution

The fourth proportional to 15,129.38, 20,881.60 and 8,755.09 is: 12,083.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.38 : 20,881.60 = 8,755.09 : x
  2. Step 2: Convert to fraction form
    15,129.38/20,881.60 = 8,755.09/x
  3. Step 3: Cross multiply
    15,129.38x = 20,881.60 × 8,755.09
  4. Step 4: Simplify right side
    15,129.38x = 182,820,213.25
  5. Step 5: Solve for x
    x = 182,820,213.25/15,129.38
  6. Step 6: Final answer
    x = 12,083.79

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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.