Home / 5,161.47-7,120.51-3,171.30

Finding the Fourth Proportional to 5,161.47, 7,120.51 and 3,171.30

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Solution

The fourth proportional to 5,161.47, 7,120.51 and 3,171.30 is: 4,374.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,161.47 : 7,120.51 = 3,171.30 : x
  2. Step 2: Convert to fraction form
    5,161.47/7,120.51 = 3,171.30/x
  3. Step 3: Cross multiply
    5,161.47x = 7,120.51 × 3,171.30
  4. Step 4: Simplify right side
    5,161.47x = 22,581,278.79
  5. Step 5: Solve for x
    x = 22,581,278.79/5,161.47
  6. Step 6: Final answer
    x = 4,374.97

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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.