Home / 20,511,534.55-28,314,633.31-12,780,396.60

Finding the Fourth Proportional to 20,511,534.55, 28,314,633.31 and 12,780,396.60

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Solution

The fourth proportional to 20,511,534.55, 28,314,633.31 and 12,780,396.60 is: 17,642,377.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,534.55 : 28,314,633.31 = 12,780,396.60 : x
  2. Step 2: Convert to fraction form
    20,511,534.55/28,314,633.31 = 12,780,396.60/x
  3. Step 3: Cross multiply
    20,511,534.55x = 28,314,633.31 × 12,780,396.60
  4. Step 4: Simplify right side
    20,511,534.55x = 361,872,243,431,489.38
  5. Step 5: Solve for x
    x = 361,872,243,431,489.38/20,511,534.55
  6. Step 6: Final answer
    x = 17,642,377.88

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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.