Home / 12,010.80-18,016.20-7,631.40

Finding the Fourth Proportional to 12,010.80, 18,016.20 and 7,631.40

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Solution

The fourth proportional to 12,010.80, 18,016.20 and 7,631.40 is: 11,447.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,010.80 : 18,016.20 = 7,631.40 : x
  2. Step 2: Convert to fraction form
    12,010.80/18,016.20 = 7,631.40/x
  3. Step 3: Cross multiply
    12,010.80x = 18,016.20 × 7,631.40
  4. Step 4: Simplify right side
    12,010.80x = 137,488,828.68
  5. Step 5: Solve for x
    x = 137,488,828.68/12,010.80
  6. Step 6: Final answer
    x = 11,447.10

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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.