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Finding the Fourth Proportional to 5,172.84, 7,139.42 and 2,934.27

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Solution

The fourth proportional to 5,172.84, 7,139.42 and 2,934.27 is: 4,049.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.84 : 7,139.42 = 2,934.27 : x
  2. Step 2: Convert to fraction form
    5,172.84/7,139.42 = 2,934.27/x
  3. Step 3: Cross multiply
    5,172.84x = 7,139.42 × 2,934.27
  4. Step 4: Simplify right side
    5,172.84x = 20,948,985.92
  5. Step 5: Solve for x
    x = 20,948,985.92/5,172.84
  6. Step 6: Final answer
    x = 4,049.80

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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.