Home / 20,779.57-31,169.15-5,197.20

Finding the Fourth Proportional to 20,779.57, 31,169.15 and 5,197.20

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Solution

The fourth proportional to 20,779.57, 31,169.15 and 5,197.20 is: 7,795.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.57 : 31,169.15 = 5,197.20 : x
  2. Step 2: Convert to fraction form
    20,779.57/31,169.15 = 5,197.20/x
  3. Step 3: Cross multiply
    20,779.57x = 31,169.15 × 5,197.20
  4. Step 4: Simplify right side
    20,779.57x = 161,992,306.38
  5. Step 5: Solve for x
    x = 161,992,306.38/20,779.57
  6. Step 6: Final answer
    x = 7,795.75

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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.