Home / 5,115.42-7,057.98-2,877.17

Finding the Fourth Proportional to 5,115.42, 7,057.98 and 2,877.17

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Solution

The fourth proportional to 5,115.42, 7,057.98 and 2,877.17 is: 3,969.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.42 : 7,057.98 = 2,877.17 : x
  2. Step 2: Convert to fraction form
    5,115.42/7,057.98 = 2,877.17/x
  3. Step 3: Cross multiply
    5,115.42x = 7,057.98 × 2,877.17
  4. Step 4: Simplify right side
    5,115.42x = 20,306,973.03
  5. Step 5: Solve for x
    x = 20,306,973.03/5,115.42
  6. Step 6: Final answer
    x = 3,969.76

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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.