Home / 20,968.13-31,452.21-5,385.75

Finding the Fourth Proportional to 20,968.13, 31,452.21 and 5,385.75

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Solution

The fourth proportional to 20,968.13, 31,452.21 and 5,385.75 is: 8,078.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.13 : 31,452.21 = 5,385.75 : x
  2. Step 2: Convert to fraction form
    20,968.13/31,452.21 = 5,385.75/x
  3. Step 3: Cross multiply
    20,968.13x = 31,452.21 × 5,385.75
  4. Step 4: Simplify right side
    20,968.13x = 169,393,740.01
  5. Step 5: Solve for x
    x = 169,393,740.01/20,968.13
  6. Step 6: Final answer
    x = 8,078.63

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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.