Home / 31,891.20-47,835.72-17,128.95

Finding the Fourth Proportional to 31,891.20, 47,835.72 and 17,128.95

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Solution

The fourth proportional to 31,891.20, 47,835.72 and 17,128.95 is: 25,692.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,891.20 : 47,835.72 = 17,128.95 : x
  2. Step 2: Convert to fraction form
    31,891.20/47,835.72 = 17,128.95/x
  3. Step 3: Cross multiply
    31,891.20x = 47,835.72 × 17,128.95
  4. Step 4: Simplify right side
    31,891.20x = 819,375,656.09
  5. Step 5: Solve for x
    x = 819,375,656.09/31,891.20
  6. Step 6: Final answer
    x = 25,692.84

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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.