Home / 20,745.18-31,117.68-5,162.80

Finding the Fourth Proportional to 20,745.18, 31,117.68 and 5,162.80

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Solution

The fourth proportional to 20,745.18, 31,117.68 and 5,162.80 is: 7,744.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.18 : 31,117.68 = 5,162.80 : x
  2. Step 2: Convert to fraction form
    20,745.18/31,117.68 = 5,162.80/x
  3. Step 3: Cross multiply
    20,745.18x = 31,117.68 × 5,162.80
  4. Step 4: Simplify right side
    20,745.18x = 160,654,358.30
  5. Step 5: Solve for x
    x = 160,654,358.30/20,745.18
  6. Step 6: Final answer
    x = 7,744.18

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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.