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Finding the Fourth Proportional to 9,191.88, 12,685.43 and 5,213.25

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Solution

The fourth proportional to 9,191.88, 12,685.43 and 5,213.25 is: 7,194.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,191.88 : 12,685.43 = 5,213.25 : x
  2. Step 2: Convert to fraction form
    9,191.88/12,685.43 = 5,213.25/x
  3. Step 3: Cross multiply
    9,191.88x = 12,685.43 × 5,213.25
  4. Step 4: Simplify right side
    9,191.88x = 66,132,337.33
  5. Step 5: Solve for x
    x = 66,132,337.33/9,191.88
  6. Step 6: Final answer
    x = 7,194.65

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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.