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Finding the Fourth Proportional to 5,776.38, 7,971.38 and 3,123.79

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Solution

The fourth proportional to 5,776.38, 7,971.38 and 3,123.79 is: 4,310.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,776.38 : 7,971.38 = 3,123.79 : x
  2. Step 2: Convert to fraction form
    5,776.38/7,971.38 = 3,123.79/x
  3. Step 3: Cross multiply
    5,776.38x = 7,971.38 × 3,123.79
  4. Step 4: Simplify right side
    5,776.38x = 24,900,893.30
  5. Step 5: Solve for x
    x = 24,900,893.30/5,776.38
  6. Step 6: Final answer
    x = 4,310.81

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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.