Home / 20,681,337.70-31,022,006.55-18,889,747.30

Finding the Fourth Proportional to 20,681,337.70, 31,022,006.55 and 18,889,747.30

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Solution

The fourth proportional to 20,681,337.70, 31,022,006.55 and 18,889,747.30 is: 28,334,620.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681,337.70 : 31,022,006.55 = 18,889,747.30 : x
  2. Step 2: Convert to fraction form
    20,681,337.70/31,022,006.55 = 18,889,747.30/x
  3. Step 3: Cross multiply
    20,681,337.70x = 31,022,006.55 × 18,889,747.30
  4. Step 4: Simplify right side
    20,681,337.70x = 585,997,864,468,444.88
  5. Step 5: Solve for x
    x = 585,997,864,468,444.88/20,681,337.70
  6. Step 6: Final answer
    x = 28,334,620.95

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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.