Home / 20,778.16-31,167.36-5,195.20

Finding the Fourth Proportional to 20,778.16, 31,167.36 and 5,195.20

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Solution

The fourth proportional to 20,778.16, 31,167.36 and 5,195.20 is: 7,792.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.16 : 31,167.36 = 5,195.20 : x
  2. Step 2: Convert to fraction form
    20,778.16/31,167.36 = 5,195.20/x
  3. Step 3: Cross multiply
    20,778.16x = 31,167.36 × 5,195.20
  4. Step 4: Simplify right side
    20,778.16x = 161,920,668.67
  5. Step 5: Solve for x
    x = 161,920,668.67/20,778.16
  6. Step 6: Final answer
    x = 7,792.83

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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.