Home / 20,691.60-31,037.48-5,109.23

Finding the Fourth Proportional to 20,691.60, 31,037.48 and 5,109.23

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Solution

The fourth proportional to 20,691.60, 31,037.48 and 5,109.23 is: 7,663.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.60 : 31,037.48 = 5,109.23 : x
  2. Step 2: Convert to fraction form
    20,691.60/31,037.48 = 5,109.23/x
  3. Step 3: Cross multiply
    20,691.60x = 31,037.48 × 5,109.23
  4. Step 4: Simplify right side
    20,691.60x = 158,577,520.56
  5. Step 5: Solve for x
    x = 158,577,520.56/20,691.60
  6. Step 6: Final answer
    x = 7,663.86

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1.5x scale

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.