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Finding the Fourth Proportional to 6,377.40, 8,791.02 and 4,138.92

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Solution

The fourth proportional to 6,377.40, 8,791.02 and 4,138.92 is: 5,705.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,377.40 : 8,791.02 = 4,138.92 : x
  2. Step 2: Convert to fraction form
    6,377.40/8,791.02 = 4,138.92/x
  3. Step 3: Cross multiply
    6,377.40x = 8,791.02 × 4,138.92
  4. Step 4: Simplify right side
    6,377.40x = 36,385,328.50
  5. Step 5: Solve for x
    x = 36,385,328.50/6,377.40
  6. Step 6: Final answer
    x = 5,705.35

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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.