Home / 14,115.20-19,478.72-8,147.12

Finding the Fourth Proportional to 14,115.20, 19,478.72 and 8,147.12

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Solution

The fourth proportional to 14,115.20, 19,478.72 and 8,147.12 is: 11,242.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,115.20 : 19,478.72 = 8,147.12 : x
  2. Step 2: Convert to fraction form
    14,115.20/19,478.72 = 8,147.12/x
  3. Step 3: Cross multiply
    14,115.20x = 19,478.72 × 8,147.12
  4. Step 4: Simplify right side
    14,115.20x = 158,695,469.29
  5. Step 5: Solve for x
    x = 158,695,469.29/14,115.20
  6. Step 6: Final answer
    x = 11,242.88

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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.