Home / 20,890,743.12-28,821,834.92-13,651,598.16

Finding the Fourth Proportional to 20,890,743.12, 28,821,834.92 and 13,651,598.16

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Solution

The fourth proportional to 20,890,743.12, 28,821,834.92 and 13,651,598.16 is: 18,834,375.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890,743.12 : 28,821,834.92 = 13,651,598.16 : x
  2. Step 2: Convert to fraction form
    20,890,743.12/28,821,834.92 = 13,651,598.16/x
  3. Step 3: Cross multiply
    20,890,743.12x = 28,821,834.92 × 13,651,598.16
  4. Step 4: Simplify right side
    20,890,743.12x = 393,464,108,561,695.75
  5. Step 5: Solve for x
    x = 393,464,108,561,695.75/20,890,743.12
  6. Step 6: Final answer
    x = 18,834,375.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.