Home / 20,755.31-28,641.20-11,801.57

Finding the Fourth Proportional to 20,755.31, 28,641.20 and 11,801.57

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Solution

The fourth proportional to 20,755.31, 28,641.20 and 11,801.57 is: 16,285.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.31 : 28,641.20 = 11,801.57 : x
  2. Step 2: Convert to fraction form
    20,755.31/28,641.20 = 11,801.57/x
  3. Step 3: Cross multiply
    20,755.31x = 28,641.20 × 11,801.57
  4. Step 4: Simplify right side
    20,755.31x = 338,010,924.47
  5. Step 5: Solve for x
    x = 338,010,924.47/20,755.31
  6. Step 6: Final answer
    x = 16,285.52

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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.