Home / 5,178.38-7,146.18-2,820.53

Finding the Fourth Proportional to 5,178.38, 7,146.18 and 2,820.53

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Solution

The fourth proportional to 5,178.38, 7,146.18 and 2,820.53 is: 3,892.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.38 : 7,146.18 = 2,820.53 : x
  2. Step 2: Convert to fraction form
    5,178.38/7,146.18 = 2,820.53/x
  3. Step 3: Cross multiply
    5,178.38x = 7,146.18 × 2,820.53
  4. Step 4: Simplify right side
    5,178.38x = 20,156,000.97
  5. Step 5: Solve for x
    x = 20,156,000.97/5,178.38
  6. Step 6: Final answer
    x = 3,892.34

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Half scale
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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.