Home / 12,078.11-18,117.23-5,499.70

Finding the Fourth Proportional to 12,078.11, 18,117.23 and 5,499.70

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Solution

The fourth proportional to 12,078.11, 18,117.23 and 5,499.70 is: 8,249.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.11 : 18,117.23 = 5,499.70 : x
  2. Step 2: Convert to fraction form
    12,078.11/18,117.23 = 5,499.70/x
  3. Step 3: Cross multiply
    12,078.11x = 18,117.23 × 5,499.70
  4. Step 4: Simplify right side
    12,078.11x = 99,639,329.83
  5. Step 5: Solve for x
    x = 99,639,329.83/12,078.11
  6. Step 6: Final answer
    x = 8,249.58

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Half scale
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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.