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Finding the Fourth Proportional to 9,489.75, 13,091.79 and 6,132.90

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Solution

The fourth proportional to 9,489.75, 13,091.79 and 6,132.90 is: 8,460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,489.75 : 13,091.79 = 6,132.90 : x
  2. Step 2: Convert to fraction form
    9,489.75/13,091.79 = 6,132.90/x
  3. Step 3: Cross multiply
    9,489.75x = 13,091.79 × 6,132.90
  4. Step 4: Simplify right side
    9,489.75x = 80,290,638.89
  5. Step 5: Solve for x
    x = 80,290,638.89/9,489.75
  6. Step 6: Final answer
    x = 8,460.77

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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.