Home / 8,115.28-12,140.89-6,146.58

Finding the Fourth Proportional to 8,115.28, 12,140.89 and 6,146.58

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Solution

The fourth proportional to 8,115.28, 12,140.89 and 6,146.58 is: 9,195.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.28 : 12,140.89 = 6,146.58 : x
  2. Step 2: Convert to fraction form
    8,115.28/12,140.89 = 6,146.58/x
  3. Step 3: Cross multiply
    8,115.28x = 12,140.89 × 6,146.58
  4. Step 4: Simplify right side
    8,115.28x = 74,625,007.75
  5. Step 5: Solve for x
    x = 74,625,007.75/8,115.28
  6. Step 6: Final answer
    x = 9,195.62

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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.