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Finding the Fourth Proportional to 6,645.40, 9,968.10 and 4,191.10

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Solution

The fourth proportional to 6,645.40, 9,968.10 and 4,191.10 is: 6,286.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.40 : 9,968.10 = 4,191.10 : x
  2. Step 2: Convert to fraction form
    6,645.40/9,968.10 = 4,191.10/x
  3. Step 3: Cross multiply
    6,645.40x = 9,968.10 × 4,191.10
  4. Step 4: Simplify right side
    6,645.40x = 41,777,303.91
  5. Step 5: Solve for x
    x = 41,777,303.91/6,645.40
  6. Step 6: Final answer
    x = 6,286.65

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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.