Home / 12,131,479.20-18,197,218.80-11,207,690.40

Finding the Fourth Proportional to 12,131,479.20, 18,197,218.80 and 11,207,690.40

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Solution

The fourth proportional to 12,131,479.20, 18,197,218.80 and 11,207,690.40 is: 16,811,535.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,131,479.20 : 18,197,218.80 = 11,207,690.40 : x
  2. Step 2: Convert to fraction form
    12,131,479.20/18,197,218.80 = 11,207,690.40/x
  3. Step 3: Cross multiply
    12,131,479.20x = 18,197,218.80 × 11,207,690.40
  4. Step 4: Simplify right side
    12,131,479.20x = 203,948,794,451,459.53
  5. Step 5: Solve for x
    x = 203,948,794,451,459.53/12,131,479.20
  6. Step 6: Final answer
    x = 16,811,535.60

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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.