Home / 20,738.90-28,620.44-11,787.90

Finding the Fourth Proportional to 20,738.90, 28,620.44 and 11,787.90

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Solution

The fourth proportional to 20,738.90, 28,620.44 and 11,787.90 is: 16,267.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.90 : 28,620.44 = 11,787.90 : x
  2. Step 2: Convert to fraction form
    20,738.90/28,620.44 = 11,787.90/x
  3. Step 3: Cross multiply
    20,738.90x = 28,620.44 × 11,787.90
  4. Step 4: Simplify right side
    20,738.90x = 337,374,825.74
  5. Step 5: Solve for x
    x = 337,374,825.74/20,738.90
  6. Step 6: Final answer
    x = 16,267.73

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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.