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Finding the Fourth Proportional to 5,197.71, 7,172.76 and 2,839.83

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Solution

The fourth proportional to 5,197.71, 7,172.76 and 2,839.83 is: 3,918.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,197.71 : 7,172.76 = 2,839.83 : x
  2. Step 2: Convert to fraction form
    5,197.71/7,172.76 = 2,839.83/x
  3. Step 3: Cross multiply
    5,197.71x = 7,172.76 × 2,839.83
  4. Step 4: Simplify right side
    5,197.71x = 20,369,419.03
  5. Step 5: Solve for x
    x = 20,369,419.03/5,197.71
  6. Step 6: Final answer
    x = 3,918.92

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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.