Home / 20,753.12-28,640.10-11,801.43

Finding the Fourth Proportional to 20,753.12, 28,640.10 and 11,801.43

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Solution

The fourth proportional to 20,753.12, 28,640.10 and 11,801.43 is: 16,286.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.12 : 28,640.10 = 11,801.43 : x
  2. Step 2: Convert to fraction form
    20,753.12/28,640.10 = 11,801.43/x
  3. Step 3: Cross multiply
    20,753.12x = 28,640.10 × 11,801.43
  4. Step 4: Simplify right side
    20,753.12x = 337,994,135.34
  5. Step 5: Solve for x
    x = 337,994,135.34/20,753.12
  6. Step 6: Final answer
    x = 16,286.43

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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.