Home / 8,631.38-12,945.20-3,085.11

Finding the Fourth Proportional to 8,631.38, 12,945.20 and 3,085.11

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Solution

The fourth proportional to 8,631.38, 12,945.20 and 3,085.11 is: 4,627.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.38 : 12,945.20 = 3,085.11 : x
  2. Step 2: Convert to fraction form
    8,631.38/12,945.20 = 3,085.11/x
  3. Step 3: Cross multiply
    8,631.38x = 12,945.20 × 3,085.11
  4. Step 4: Simplify right side
    8,631.38x = 39,937,365.97
  5. Step 5: Solve for x
    x = 39,937,365.97/8,631.38
  6. Step 6: Final answer
    x = 4,627.00

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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.