Home / 20,780,900.97-28,672,885.20-12,406,640.91

Finding the Fourth Proportional to 20,780,900.97, 28,672,885.20 and 12,406,640.91

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Solution

The fourth proportional to 20,780,900.97, 28,672,885.20 and 12,406,640.91 is: 17,118,323.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780,900.97 : 28,672,885.20 = 12,406,640.91 : x
  2. Step 2: Convert to fraction form
    20,780,900.97/28,672,885.20 = 12,406,640.91/x
  3. Step 3: Cross multiply
    20,780,900.97x = 28,672,885.20 × 12,406,640.91
  4. Step 4: Simplify right side
    20,780,900.97x = 355,734,190,530,053.50
  5. Step 5: Solve for x
    x = 355,734,190,530,053.50/20,780,900.97
  6. Step 6: Final answer
    x = 17,118,323.75

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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.