Home / 31,869.20-47,825.40-20,748.80

Finding the Fourth Proportional to 31,869.20, 47,825.40 and 20,748.80

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Solution

The fourth proportional to 31,869.20, 47,825.40 and 20,748.80 is: 31,137.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,869.20 : 47,825.40 = 20,748.80 : x
  2. Step 2: Convert to fraction form
    31,869.20/47,825.40 = 20,748.80/x
  3. Step 3: Cross multiply
    31,869.20x = 47,825.40 × 20,748.80
  4. Step 4: Simplify right side
    31,869.20x = 992,319,659.52
  5. Step 5: Solve for x
    x = 992,319,659.52/31,869.20
  6. Step 6: Final answer
    x = 31,137.26

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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.