Home / 28,375.20-42,562.80-13,612.95

Finding the Fourth Proportional to 28,375.20, 42,562.80 and 13,612.95

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Solution

The fourth proportional to 28,375.20, 42,562.80 and 13,612.95 is: 20,419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.20 : 42,562.80 = 13,612.95 : x
  2. Step 2: Convert to fraction form
    28,375.20/42,562.80 = 13,612.95/x
  3. Step 3: Cross multiply
    28,375.20x = 42,562.80 × 13,612.95
  4. Step 4: Simplify right side
    28,375.20x = 579,405,268.26
  5. Step 5: Solve for x
    x = 579,405,268.26/28,375.20
  6. Step 6: Final answer
    x = 20,419.43

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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.