Home / 20,819,809.61-31,236,247.62-12,520,165.57

Finding the Fourth Proportional to 20,819,809.61, 31,236,247.62 and 12,520,165.57

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Solution

The fourth proportional to 20,819,809.61, 31,236,247.62 and 12,520,165.57 is: 18,784,177.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819,809.61 : 31,236,247.62 = 12,520,165.57 : x
  2. Step 2: Convert to fraction form
    20,819,809.61/31,236,247.62 = 12,520,165.57/x
  3. Step 3: Cross multiply
    20,819,809.61x = 31,236,247.62 × 12,520,165.57
  4. Step 4: Simplify right side
    20,819,809.61x = 391,082,991,909,827.88
  5. Step 5: Solve for x
    x = 391,082,991,909,827.88/20,819,809.61
  6. Step 6: Final answer
    x = 18,784,177.15

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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.