Home / 5,178.38-7,146.11-2,820.47

Finding the Fourth Proportional to 5,178.38, 7,146.11 and 2,820.47

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Solution

The fourth proportional to 5,178.38, 7,146.11 and 2,820.47 is: 3,892.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.38 : 7,146.11 = 2,820.47 : x
  2. Step 2: Convert to fraction form
    5,178.38/7,146.11 = 2,820.47/x
  3. Step 3: Cross multiply
    5,178.38x = 7,146.11 × 2,820.47
  4. Step 4: Simplify right side
    5,178.38x = 20,155,374.77
  5. Step 5: Solve for x
    x = 20,155,374.77/5,178.38
  6. Step 6: Final answer
    x = 3,892.22

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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.