Home / 5,178.88-7,146.79-2,820.97

Finding the Fourth Proportional to 5,178.88, 7,146.79 and 2,820.97

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Solution

The fourth proportional to 5,178.88, 7,146.79 and 2,820.97 is: 3,892.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.88 : 7,146.79 = 2,820.97 : x
  2. Step 2: Convert to fraction form
    5,178.88/7,146.79 = 2,820.97/x
  3. Step 3: Cross multiply
    5,178.88x = 7,146.79 × 2,820.97
  4. Step 4: Simplify right side
    5,178.88x = 20,160,880.19
  5. Step 5: Solve for x
    x = 20,160,880.19/5,178.88
  6. Step 6: Final answer
    x = 3,892.90

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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.