Home / 20,719,815.40-31,079,723.10-12,657,658.60

Finding the Fourth Proportional to 20,719,815.40, 31,079,723.10 and 12,657,658.60

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Solution

The fourth proportional to 20,719,815.40, 31,079,723.10 and 12,657,658.60 is: 18,986,487.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719,815.40 : 31,079,723.10 = 12,657,658.60 : x
  2. Step 2: Convert to fraction form
    20,719,815.40/31,079,723.10 = 12,657,658.60/x
  3. Step 3: Cross multiply
    20,719,815.40x = 31,079,723.10 × 12,657,658.60
  4. Step 4: Simplify right side
    20,719,815.40x = 393,396,524,382,333.69
  5. Step 5: Solve for x
    x = 393,396,524,382,333.69/20,719,815.40
  6. Step 6: Final answer
    x = 18,986,487.90

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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.