Home / 20,442,813.40-30,664,220.10-15,340,979.80

Finding the Fourth Proportional to 20,442,813.40, 30,664,220.10 and 15,340,979.80

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Solution

The fourth proportional to 20,442,813.40, 30,664,220.10 and 15,340,979.80 is: 23,011,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442,813.40 : 30,664,220.10 = 15,340,979.80 : x
  2. Step 2: Convert to fraction form
    20,442,813.40/30,664,220.10 = 15,340,979.80/x
  3. Step 3: Cross multiply
    20,442,813.40x = 30,664,220.10 × 15,340,979.80
  4. Step 4: Simplify right side
    20,442,813.40x = 470,419,181,136,854
  5. Step 5: Solve for x
    x = 470,419,181,136,854/20,442,813.40
  6. Step 6: Final answer
    x = 23,011,469.70

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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.