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Finding the Fourth Proportional to 6,650.56, 9,975.84 and 3,187

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Solution

The fourth proportional to 6,650.56, 9,975.84 and 3,187 is: 4,780.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,650.56 : 9,975.84 = 3,187 : x
  2. Step 2: Convert to fraction form
    6,650.56/9,975.84 = 3,187/x
  3. Step 3: Cross multiply
    6,650.56x = 9,975.84 × 3,187
  4. Step 4: Simplify right side
    6,650.56x = 31,793,002.08
  5. Step 5: Solve for x
    x = 31,793,002.08/6,650.56
  6. Step 6: Final answer
    x = 4,780.50

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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.