Home / 20,511,235.68-28,314,221.04-12,780,097.76

Finding the Fourth Proportional to 20,511,235.68, 28,314,221.04 and 12,780,097.76

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Solution

The fourth proportional to 20,511,235.68, 28,314,221.04 and 12,780,097.76 is: 17,641,965.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,235.68 : 28,314,221.04 = 12,780,097.76 : x
  2. Step 2: Convert to fraction form
    20,511,235.68/28,314,221.04 = 12,780,097.76/x
  3. Step 3: Cross multiply
    20,511,235.68x = 28,314,221.04 × 12,780,097.76
  4. Step 4: Simplify right side
    20,511,235.68x = 361,858,512,889,448.88
  5. Step 5: Solve for x
    x = 361,858,512,889,448.88/20,511,235.68
  6. Step 6: Final answer
    x = 17,641,965.53

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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.