Home / 13,115.10-18,096.66-8,640.66

Finding the Fourth Proportional to 13,115.10, 18,096.66 and 8,640.66

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Solution

The fourth proportional to 13,115.10, 18,096.66 and 8,640.66 is: 11,922.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.10 : 18,096.66 = 8,640.66 : x
  2. Step 2: Convert to fraction form
    13,115.10/18,096.66 = 8,640.66/x
  3. Step 3: Cross multiply
    13,115.10x = 18,096.66 × 8,640.66
  4. Step 4: Simplify right side
    13,115.10x = 156,367,086.20
  5. Step 5: Solve for x
    x = 156,367,086.20/13,115.10
  6. Step 6: Final answer
    x = 11,922.68

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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.