Home / 13,147.98-18,144.24-7,179.78

Finding the Fourth Proportional to 13,147.98, 18,144.24 and 7,179.78

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Solution

The fourth proportional to 13,147.98, 18,144.24 and 7,179.78 is: 9,908.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.98 : 18,144.24 = 7,179.78 : x
  2. Step 2: Convert to fraction form
    13,147.98/18,144.24 = 7,179.78/x
  3. Step 3: Cross multiply
    13,147.98x = 18,144.24 × 7,179.78
  4. Step 4: Simplify right side
    13,147.98x = 130,271,651.47
  5. Step 5: Solve for x
    x = 130,271,651.47/13,147.98
  6. Step 6: Final answer
    x = 9,908.11

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Double scale
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Similar ratio
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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.