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Finding the Fourth Proportional to 28,238.80, 38,968.92 and 17,480.80

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Solution

The fourth proportional to 28,238.80, 38,968.92 and 17,480.80 is: 24,123.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.80 : 38,968.92 = 17,480.80 : x
  2. Step 2: Convert to fraction form
    28,238.80/38,968.92 = 17,480.80/x
  3. Step 3: Cross multiply
    28,238.80x = 38,968.92 × 17,480.80
  4. Step 4: Simplify right side
    28,238.80x = 681,207,896.74
  5. Step 5: Solve for x
    x = 681,207,896.74/28,238.80
  6. Step 6: Final answer
    x = 24,123.12

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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.