Home / 20,511,535.55-28,314,634.69-12,780,397.60

Finding the Fourth Proportional to 20,511,535.55, 28,314,634.69 and 12,780,397.60

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Solution

The fourth proportional to 20,511,535.55, 28,314,634.69 and 12,780,397.60 is: 17,642,379.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,535.55 : 28,314,634.69 = 12,780,397.60 : x
  2. Step 2: Convert to fraction form
    20,511,535.55/28,314,634.69 = 12,780,397.60/x
  3. Step 3: Cross multiply
    20,511,535.55x = 28,314,634.69 × 12,780,397.60
  4. Step 4: Simplify right side
    20,511,535.55x = 361,872,289,236,952.75
  5. Step 5: Solve for x
    x = 361,872,289,236,952.75/20,511,535.55
  6. Step 6: Final answer
    x = 17,642,379.25

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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.