Home / 31,819.60-47,729.40-30,215.80

Finding the Fourth Proportional to 31,819.60, 47,729.40 and 30,215.80

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Solution

The fourth proportional to 31,819.60, 47,729.40 and 30,215.80 is: 45,323.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,819.60 : 47,729.40 = 30,215.80 : x
  2. Step 2: Convert to fraction form
    31,819.60/47,729.40 = 30,215.80/x
  3. Step 3: Cross multiply
    31,819.60x = 47,729.40 × 30,215.80
  4. Step 4: Simplify right side
    31,819.60x = 1,442,182,004.52
  5. Step 5: Solve for x
    x = 1,442,182,004.52/31,819.60
  6. Step 6: Final answer
    x = 45,323.70

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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.