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Finding the Fourth Proportional to 13,756,815.20, 20,635,417.20 and 5,237,617.52

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Solution

The fourth proportional to 13,756,815.20, 20,635,417.20 and 5,237,617.52 is: 7,856,500.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756,815.20 : 20,635,417.20 = 5,237,617.52 : x
  2. Step 2: Convert to fraction form
    13,756,815.20/20,635,417.20 = 5,237,617.52/x
  3. Step 3: Cross multiply
    13,756,815.20x = 20,635,417.20 × 5,237,617.52
  4. Step 4: Simplify right side
    13,756,815.20x = 108,080,422,659,229.33
  5. Step 5: Solve for x
    x = 108,080,422,659,229.33/13,756,815.20
  6. Step 6: Final answer
    x = 7,856,500.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.