Home / 21,143,631.20-31,715,446.80-20,612,190.20

Finding the Fourth Proportional to 21,143,631.20, 31,715,446.80 and 20,612,190.20

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Solution

The fourth proportional to 21,143,631.20, 31,715,446.80 and 20,612,190.20 is: 30,918,285.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143,631.20 : 31,715,446.80 = 20,612,190.20 : x
  2. Step 2: Convert to fraction form
    21,143,631.20/31,715,446.80 = 20,612,190.20/x
  3. Step 3: Cross multiply
    21,143,631.20x = 31,715,446.80 × 20,612,190.20
  4. Step 4: Simplify right side
    21,143,631.20x = 653,724,821,719,581.38
  5. Step 5: Solve for x
    x = 653,724,821,719,581.38/21,143,631.20
  6. Step 6: Final answer
    x = 30,918,285.30

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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.