Home / 29,147.28-40,229.85-20,640.54

Finding the Fourth Proportional to 29,147.28, 40,229.85 and 20,640.54

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Solution

The fourth proportional to 29,147.28, 40,229.85 and 20,640.54 is: 28,488.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,147.28 : 40,229.85 = 20,640.54 : x
  2. Step 2: Convert to fraction form
    29,147.28/40,229.85 = 20,640.54/x
  3. Step 3: Cross multiply
    29,147.28x = 40,229.85 × 20,640.54
  4. Step 4: Simplify right side
    29,147.28x = 830,365,828.12
  5. Step 5: Solve for x
    x = 830,365,828.12/29,147.28
  6. Step 6: Final answer
    x = 28,488.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.