Home / 10,115.80-15,147.18-8,130.86

Finding the Fourth Proportional to 10,115.80, 15,147.18 and 8,130.86

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Solution

The fourth proportional to 10,115.80, 15,147.18 and 8,130.86 is: 12,174.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.80 : 15,147.18 = 8,130.86 : x
  2. Step 2: Convert to fraction form
    10,115.80/15,147.18 = 8,130.86/x
  3. Step 3: Cross multiply
    10,115.80x = 15,147.18 × 8,130.86
  4. Step 4: Simplify right side
    10,115.80x = 123,159,599.97
  5. Step 5: Solve for x
    x = 123,159,599.97/10,115.80
  6. Step 6: Final answer
    x = 12,174.97

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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.