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Finding the Fourth Proportional to 5,169.56, 7,134.08 and 2,931.39

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Solution

The fourth proportional to 5,169.56, 7,134.08 and 2,931.39 is: 4,045.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,169.56 : 7,134.08 = 2,931.39 : x
  2. Step 2: Convert to fraction form
    5,169.56/7,134.08 = 2,931.39/x
  3. Step 3: Cross multiply
    5,169.56x = 7,134.08 × 2,931.39
  4. Step 4: Simplify right side
    5,169.56x = 20,912,756.11
  5. Step 5: Solve for x
    x = 20,912,756.11/5,169.56
  6. Step 6: Final answer
    x = 4,045.36

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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.