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Finding the Fourth Proportional to 18,061.12, 27,091.68 and 7,667.20

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Solution

The fourth proportional to 18,061.12, 27,091.68 and 7,667.20 is: 11,500.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,061.12 : 27,091.68 = 7,667.20 : x
  2. Step 2: Convert to fraction form
    18,061.12/27,091.68 = 7,667.20/x
  3. Step 3: Cross multiply
    18,061.12x = 27,091.68 × 7,667.20
  4. Step 4: Simplify right side
    18,061.12x = 207,717,328.90
  5. Step 5: Solve for x
    x = 207,717,328.90/18,061.12
  6. Step 6: Final answer
    x = 11,500.80

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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.