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Finding the Fourth Proportional to 6,987.60, 10,481.40 and 4,217.40

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Solution

The fourth proportional to 6,987.60, 10,481.40 and 4,217.40 is: 6,326.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.60 : 10,481.40 = 4,217.40 : x
  2. Step 2: Convert to fraction form
    6,987.60/10,481.40 = 4,217.40/x
  3. Step 3: Cross multiply
    6,987.60x = 10,481.40 × 4,217.40
  4. Step 4: Simplify right side
    6,987.60x = 44,204,256.36
  5. Step 5: Solve for x
    x = 44,204,256.36/6,987.60
  6. Step 6: Final answer
    x = 6,326.10

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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.