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Finding the Fourth Proportional to 18,774.85, 25,899.27 and 11,608.78

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Solution

The fourth proportional to 18,774.85, 25,899.27 and 11,608.78 is: 16,013.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.85 : 25,899.27 = 11,608.78 : x
  2. Step 2: Convert to fraction form
    18,774.85/25,899.27 = 11,608.78/x
  3. Step 3: Cross multiply
    18,774.85x = 25,899.27 × 11,608.78
  4. Step 4: Simplify right side
    18,774.85x = 300,658,927.59
  5. Step 5: Solve for x
    x = 300,658,927.59/18,774.85
  6. Step 6: Final answer
    x = 16,013.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.