Home / 28,191.71-42,274.80-13,418.52

Finding the Fourth Proportional to 28,191.71, 42,274.80 and 13,418.52

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Solution

The fourth proportional to 28,191.71, 42,274.80 and 13,418.52 is: 20,121.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,191.71 : 42,274.80 = 13,418.52 : x
  2. Step 2: Convert to fraction form
    28,191.71/42,274.80 = 13,418.52/x
  3. Step 3: Cross multiply
    28,191.71x = 42,274.80 × 13,418.52
  4. Step 4: Simplify right side
    28,191.71x = 567,265,249.30
  5. Step 5: Solve for x
    x = 567,265,249.30/28,191.71
  6. Step 6: Final answer
    x = 20,121.71

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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.