Home / 20,656.20-31,049.10-19,489.80

Finding the Fourth Proportional to 20,656.20, 31,049.10 and 19,489.80

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Solution

The fourth proportional to 20,656.20, 31,049.10 and 19,489.80 is: 29,295.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.20 : 31,049.10 = 19,489.80 : x
  2. Step 2: Convert to fraction form
    20,656.20/31,049.10 = 19,489.80/x
  3. Step 3: Cross multiply
    20,656.20x = 31,049.10 × 19,489.80
  4. Step 4: Simplify right side
    20,656.20x = 605,140,749.18
  5. Step 5: Solve for x
    x = 605,140,749.18/20,656.20
  6. Step 6: Final answer
    x = 29,295.84

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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.