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Finding the Fourth Proportional to 5,167.56, 7,167.81 and 4,990.55

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Solution

The fourth proportional to 5,167.56, 7,167.81 and 4,990.55 is: 6,922.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,167.56 : 7,167.81 = 4,990.55 : x
  2. Step 2: Convert to fraction form
    5,167.56/7,167.81 = 4,990.55/x
  3. Step 3: Cross multiply
    5,167.56x = 7,167.81 × 4,990.55
  4. Step 4: Simplify right side
    5,167.56x = 35,771,278.36
  5. Step 5: Solve for x
    x = 35,771,278.36/5,167.56
  6. Step 6: Final answer
    x = 6,922.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.