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Finding the Fourth Proportional to 5,778.80, 7,974.69 and 3,126.16

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Solution

The fourth proportional to 5,778.80, 7,974.69 and 3,126.16 is: 4,314.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,778.80 : 7,974.69 = 3,126.16 : x
  2. Step 2: Convert to fraction form
    5,778.80/7,974.69 = 3,126.16/x
  3. Step 3: Cross multiply
    5,778.80x = 7,974.69 × 3,126.16
  4. Step 4: Simplify right side
    5,778.80x = 24,930,156.89
  5. Step 5: Solve for x
    x = 24,930,156.89/5,778.80
  6. Step 6: Final answer
    x = 4,314.07

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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.