Home / 12,007.20-18,010.85-5,425.68

Finding the Fourth Proportional to 12,007.20, 18,010.85 and 5,425.68

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Solution

The fourth proportional to 12,007.20, 18,010.85 and 5,425.68 is: 8,138.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,007.20 : 18,010.85 = 5,425.68 : x
  2. Step 2: Convert to fraction form
    12,007.20/18,010.85 = 5,425.68/x
  3. Step 3: Cross multiply
    12,007.20x = 18,010.85 × 5,425.68
  4. Step 4: Simplify right side
    12,007.20x = 97,721,081.50
  5. Step 5: Solve for x
    x = 97,721,081.50/12,007.20
  6. Step 6: Final answer
    x = 8,138.54

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.