Home / 20,511,531.70-28,314,629.38-12,780,393.76

Finding the Fourth Proportional to 20,511,531.70, 28,314,629.38 and 12,780,393.76

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Solution

The fourth proportional to 20,511,531.70, 28,314,629.38 and 12,780,393.76 is: 17,642,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,531.70 : 28,314,629.38 = 12,780,393.76 : x
  2. Step 2: Convert to fraction form
    20,511,531.70/28,314,629.38 = 12,780,393.76/x
  3. Step 3: Cross multiply
    20,511,531.70x = 28,314,629.38 × 12,780,393.76
  4. Step 4: Simplify right side
    20,511,531.70x = 361,872,112,644,864.62
  5. Step 5: Solve for x
    x = 361,872,112,644,864.62/20,511,531.70
  6. Step 6: Final answer
    x = 17,642,373.96

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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.