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Finding the Fourth Proportional to 18,489.01, 27,758.15 and 12,505.19

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Solution

The fourth proportional to 18,489.01, 27,758.15 and 12,505.19 is: 18,774.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.01 : 27,758.15 = 12,505.19 : x
  2. Step 2: Convert to fraction form
    18,489.01/27,758.15 = 12,505.19/x
  3. Step 3: Cross multiply
    18,489.01x = 27,758.15 × 12,505.19
  4. Step 4: Simplify right side
    18,489.01x = 347,120,738.48
  5. Step 5: Solve for x
    x = 347,120,738.48/18,489.01
  6. Step 6: Final answer
    x = 18,774.44

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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.