Home / 21,818.73-30,109.07-13,335.05

Finding the Fourth Proportional to 21,818.73, 30,109.07 and 13,335.05

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Solution

The fourth proportional to 21,818.73, 30,109.07 and 13,335.05 is: 18,401.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.73 : 30,109.07 = 13,335.05 : x
  2. Step 2: Convert to fraction form
    21,818.73/30,109.07 = 13,335.05/x
  3. Step 3: Cross multiply
    21,818.73x = 30,109.07 × 13,335.05
  4. Step 4: Simplify right side
    21,818.73x = 401,505,736.68
  5. Step 5: Solve for x
    x = 401,505,736.68/21,818.73
  6. Step 6: Final answer
    x = 18,401.88

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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.