Home / 13,540.20-20,306.19-5,219.57

Finding the Fourth Proportional to 13,540.20, 20,306.19 and 5,219.57

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Solution

The fourth proportional to 13,540.20, 20,306.19 and 5,219.57 is: 7,827.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.20 : 20,306.19 = 5,219.57 : x
  2. Step 2: Convert to fraction form
    13,540.20/20,306.19 = 5,219.57/x
  3. Step 3: Cross multiply
    13,540.20x = 20,306.19 × 5,219.57
  4. Step 4: Simplify right side
    13,540.20x = 105,989,650.48
  5. Step 5: Solve for x
    x = 105,989,650.48/13,540.20
  6. Step 6: Final answer
    x = 7,827.78

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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.