Home / 20,702.75-28,553.18-13,532.09

Finding the Fourth Proportional to 20,702.75, 28,553.18 and 13,532.09

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Solution

The fourth proportional to 20,702.75, 28,553.18 and 13,532.09 is: 18,663.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.75 : 28,553.18 = 13,532.09 : x
  2. Step 2: Convert to fraction form
    20,702.75/28,553.18 = 13,532.09/x
  3. Step 3: Cross multiply
    20,702.75x = 28,553.18 × 13,532.09
  4. Step 4: Simplify right side
    20,702.75x = 386,383,991.12
  5. Step 5: Solve for x
    x = 386,383,991.12/20,702.75
  6. Step 6: Final answer
    x = 18,663.42

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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.