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Finding the Fourth Proportional to 18,115.30, 27,140.55 and 15,523.30

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Solution

The fourth proportional to 18,115.30, 27,140.55 and 15,523.30 is: 23,257.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.30 : 27,140.55 = 15,523.30 : x
  2. Step 2: Convert to fraction form
    18,115.30/27,140.55 = 15,523.30/x
  3. Step 3: Cross multiply
    18,115.30x = 27,140.55 × 15,523.30
  4. Step 4: Simplify right side
    18,115.30x = 421,310,899.82
  5. Step 5: Solve for x
    x = 421,310,899.82/18,115.30
  6. Step 6: Final answer
    x = 23,257.19

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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.