Home / 8,086.31-12,129.46-3,638.78

Finding the Fourth Proportional to 8,086.31, 12,129.46 and 3,638.78

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Solution

The fourth proportional to 8,086.31, 12,129.46 and 3,638.78 is: 5,458.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,086.31 : 12,129.46 = 3,638.78 : x
  2. Step 2: Convert to fraction form
    8,086.31/12,129.46 = 3,638.78/x
  3. Step 3: Cross multiply
    8,086.31x = 12,129.46 × 3,638.78
  4. Step 4: Simplify right side
    8,086.31x = 44,136,395.52
  5. Step 5: Solve for x
    x = 44,136,395.52/8,086.31
  6. Step 6: Final answer
    x = 5,458.16

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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.