Home / 20,819,812.14-31,236,251.42-12,520,168.11

Finding the Fourth Proportional to 20,819,812.14, 31,236,251.42 and 12,520,168.11

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Solution

The fourth proportional to 20,819,812.14, 31,236,251.42 and 12,520,168.11 is: 18,784,180.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819,812.14 : 31,236,251.42 = 12,520,168.11 : x
  2. Step 2: Convert to fraction form
    20,819,812.14/31,236,251.42 = 12,520,168.11/x
  3. Step 3: Cross multiply
    20,819,812.14x = 31,236,251.42 × 12,520,168.11
  4. Step 4: Simplify right side
    20,819,812.14x = 391,083,118,935,926.62
  5. Step 5: Solve for x
    x = 391,083,118,935,926.62/20,819,812.14
  6. Step 6: Final answer
    x = 18,784,180.97

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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.