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Finding the Fourth Proportional to 18,105.30, 27,125.55 and 15,513.30

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Solution

The fourth proportional to 18,105.30, 27,125.55 and 15,513.30 is: 23,242.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,105.30 : 27,125.55 = 15,513.30 : x
  2. Step 2: Convert to fraction form
    18,105.30/27,125.55 = 15,513.30/x
  3. Step 3: Cross multiply
    18,105.30x = 27,125.55 × 15,513.30
  4. Step 4: Simplify right side
    18,105.30x = 420,806,794.82
  5. Step 5: Solve for x
    x = 420,806,794.82/18,105.30
  6. Step 6: Final answer
    x = 23,242.19

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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.