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Finding the Fourth Proportional to 28,173.78, 42,224.04 and 11,514.78

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Solution

The fourth proportional to 28,173.78, 42,224.04 and 11,514.78 is: 17,257.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173.78 : 42,224.04 = 11,514.78 : x
  2. Step 2: Convert to fraction form
    28,173.78/42,224.04 = 11,514.78/x
  3. Step 3: Cross multiply
    28,173.78x = 42,224.04 × 11,514.78
  4. Step 4: Simplify right side
    28,173.78x = 486,200,531.31
  5. Step 5: Solve for x
    x = 486,200,531.31/28,173.78
  6. Step 6: Final answer
    x = 17,257.20

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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.