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Finding the Fourth Proportional to 18,109.78, 27,170.58 and 8,750.87

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Solution

The fourth proportional to 18,109.78, 27,170.58 and 8,750.87 is: 13,129.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109.78 : 27,170.58 = 8,750.87 : x
  2. Step 2: Convert to fraction form
    18,109.78/27,170.58 = 8,750.87/x
  3. Step 3: Cross multiply
    18,109.78x = 27,170.58 × 8,750.87
  4. Step 4: Simplify right side
    18,109.78x = 237,766,213.40
  5. Step 5: Solve for x
    x = 237,766,213.40/18,109.78
  6. Step 6: Final answer
    x = 13,129.16

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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.