Home / 8,115.20-12,165.60-5,343.20

Finding the Fourth Proportional to 8,115.20, 12,165.60 and 5,343.20

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Solution

The fourth proportional to 8,115.20, 12,165.60 and 5,343.20 is: 8,010.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.20 : 12,165.60 = 5,343.20 : x
  2. Step 2: Convert to fraction form
    8,115.20/12,165.60 = 5,343.20/x
  3. Step 3: Cross multiply
    8,115.20x = 12,165.60 × 5,343.20
  4. Step 4: Simplify right side
    8,115.20x = 65,003,233.92
  5. Step 5: Solve for x
    x = 65,003,233.92/8,115.20
  6. Step 6: Final answer
    x = 8,010.06

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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.