Home / 27,991.29-38,635.92-18,438.15

Finding the Fourth Proportional to 27,991.29, 38,635.92 and 18,438.15

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Solution

The fourth proportional to 27,991.29, 38,635.92 and 18,438.15 is: 25,449.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,991.29 : 38,635.92 = 18,438.15 : x
  2. Step 2: Convert to fraction form
    27,991.29/38,635.92 = 18,438.15/x
  3. Step 3: Cross multiply
    27,991.29x = 38,635.92 × 18,438.15
  4. Step 4: Simplify right side
    27,991.29x = 712,374,888.35
  5. Step 5: Solve for x
    x = 712,374,888.35/27,991.29
  6. Step 6: Final answer
    x = 25,449.88

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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.