Home / 12,116.20-18,174.30-7,720.60

Finding the Fourth Proportional to 12,116.20, 18,174.30 and 7,720.60

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Solution

The fourth proportional to 12,116.20, 18,174.30 and 7,720.60 is: 11,580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.20 : 18,174.30 = 7,720.60 : x
  2. Step 2: Convert to fraction form
    12,116.20/18,174.30 = 7,720.60/x
  3. Step 3: Cross multiply
    12,116.20x = 18,174.30 × 7,720.60
  4. Step 4: Simplify right side
    12,116.20x = 140,316,500.58
  5. Step 5: Solve for x
    x = 140,316,500.58/12,116.20
  6. Step 6: Final answer
    x = 11,580.90

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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.