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Finding the Fourth Proportional to 5,906.10, 8,859.15 and 3,947.70

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Solution

The fourth proportional to 5,906.10, 8,859.15 and 3,947.70 is: 5,921.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,906.10 : 8,859.15 = 3,947.70 : x
  2. Step 2: Convert to fraction form
    5,906.10/8,859.15 = 3,947.70/x
  3. Step 3: Cross multiply
    5,906.10x = 8,859.15 × 3,947.70
  4. Step 4: Simplify right side
    5,906.10x = 34,973,266.46
  5. Step 5: Solve for x
    x = 34,973,266.46/5,906.10
  6. Step 6: Final answer
    x = 5,921.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.