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Finding the Fourth Proportional to 5,447.40, 8,171.10 and 5,389.80

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Solution

The fourth proportional to 5,447.40, 8,171.10 and 5,389.80 is: 8,084.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,447.40 : 8,171.10 = 5,389.80 : x
  2. Step 2: Convert to fraction form
    5,447.40/8,171.10 = 5,389.80/x
  3. Step 3: Cross multiply
    5,447.40x = 8,171.10 × 5,389.80
  4. Step 4: Simplify right side
    5,447.40x = 44,040,594.78
  5. Step 5: Solve for x
    x = 44,040,594.78/5,447.40
  6. Step 6: Final answer
    x = 8,084.70

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Half scale
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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.