Home / 20,838,908.10-31,247,864.55-12,321,855.30

Finding the Fourth Proportional to 20,838,908.10, 31,247,864.55 and 12,321,855.30

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Solution

The fourth proportional to 20,838,908.10, 31,247,864.55 and 12,321,855.30 is: 18,476,575.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838,908.10 : 31,247,864.55 = 12,321,855.30 : x
  2. Step 2: Convert to fraction form
    20,838,908.10/31,247,864.55 = 12,321,855.30/x
  3. Step 3: Cross multiply
    20,838,908.10x = 31,247,864.55 × 12,321,855.30
  4. Step 4: Simplify right side
    20,838,908.10x = 385,031,665,419,099.62
  5. Step 5: Solve for x
    x = 385,031,665,419,099.62/20,838,908.10
  6. Step 6: Final answer
    x = 18,476,575.82

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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.