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Finding the Fourth Proportional to 5,169.78, 7,134.62 and 2,931.62

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Solution

The fourth proportional to 5,169.78, 7,134.62 and 2,931.62 is: 4,045.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,169.78 : 7,134.62 = 2,931.62 : x
  2. Step 2: Convert to fraction form
    5,169.78/7,134.62 = 2,931.62/x
  3. Step 3: Cross multiply
    5,169.78x = 7,134.62 × 2,931.62
  4. Step 4: Simplify right side
    5,169.78x = 20,915,944.35
  5. Step 5: Solve for x
    x = 20,915,944.35/5,169.78
  6. Step 6: Final answer
    x = 4,045.81

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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.