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Finding the Fourth Proportional to 6,241.80, 8,611.60 and 4,118.39

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Solution

The fourth proportional to 6,241.80, 8,611.60 and 4,118.39 is: 5,681.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,241.80 : 8,611.60 = 4,118.39 : x
  2. Step 2: Convert to fraction form
    6,241.80/8,611.60 = 4,118.39/x
  3. Step 3: Cross multiply
    6,241.80x = 8,611.60 × 4,118.39
  4. Step 4: Simplify right side
    6,241.80x = 35,465,863.67
  5. Step 5: Solve for x
    x = 35,465,863.67/6,241.80
  6. Step 6: Final answer
    x = 5,681.99

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.