Home / 21,801.12-30,081.45-12,851.43

Finding the Fourth Proportional to 21,801.12, 30,081.45 and 12,851.43

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Solution

The fourth proportional to 21,801.12, 30,081.45 and 12,851.43 is: 17,732.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,801.12 : 30,081.45 = 12,851.43 : x
  2. Step 2: Convert to fraction form
    21,801.12/30,081.45 = 12,851.43/x
  3. Step 3: Cross multiply
    21,801.12x = 30,081.45 × 12,851.43
  4. Step 4: Simplify right side
    21,801.12x = 386,589,648.97
  5. Step 5: Solve for x
    x = 386,589,648.97/21,801.12
  6. Step 6: Final answer
    x = 17,732.56

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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.