Home / 5,178.12-7,145.82-3,082.20

Finding the Fourth Proportional to 5,178.12, 7,145.82 and 3,082.20

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Solution

The fourth proportional to 5,178.12, 7,145.82 and 3,082.20 is: 4,253.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.12 : 7,145.82 = 3,082.20 : x
  2. Step 2: Convert to fraction form
    5,178.12/7,145.82 = 3,082.20/x
  3. Step 3: Cross multiply
    5,178.12x = 7,145.82 × 3,082.20
  4. Step 4: Simplify right side
    5,178.12x = 22,024,846.40
  5. Step 5: Solve for x
    x = 22,024,846.40/5,178.12
  6. Step 6: Final answer
    x = 4,253.44

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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.