Home / 5,147.28-7,720.96-1,251.72

Finding the Fourth Proportional to 5,147.28, 7,720.96 and 1,251.72

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Solution

The fourth proportional to 5,147.28, 7,720.96 and 1,251.72 is: 1,877.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.28 : 7,720.96 = 1,251.72 : x
  2. Step 2: Convert to fraction form
    5,147.28/7,720.96 = 1,251.72/x
  3. Step 3: Cross multiply
    5,147.28x = 7,720.96 × 1,251.72
  4. Step 4: Simplify right side
    5,147.28x = 9,664,480.05
  5. Step 5: Solve for x
    x = 9,664,480.05/5,147.28
  6. Step 6: Final answer
    x = 1,877.59

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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.