Home / 12,099.90-18,149.85-9,147.45

Finding the Fourth Proportional to 12,099.90, 18,149.85 and 9,147.45

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Solution

The fourth proportional to 12,099.90, 18,149.85 and 9,147.45 is: 13,721.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,099.90 : 18,149.85 = 9,147.45 : x
  2. Step 2: Convert to fraction form
    12,099.90/18,149.85 = 9,147.45/x
  3. Step 3: Cross multiply
    12,099.90x = 18,149.85 × 9,147.45
  4. Step 4: Simplify right side
    12,099.90x = 166,024,845.38
  5. Step 5: Solve for x
    x = 166,024,845.38/12,099.90
  6. Step 6: Final answer
    x = 13,721.18

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Similar ratio
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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.