Home / 18,680.91-25,780.10-11,508.18

Finding the Fourth Proportional to 18,680.91, 25,780.10 and 11,508.18

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Solution

The fourth proportional to 18,680.91, 25,780.10 and 11,508.18 is: 15,881.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.91 : 25,780.10 = 11,508.18 : x
  2. Step 2: Convert to fraction form
    18,680.91/25,780.10 = 11,508.18/x
  3. Step 3: Cross multiply
    18,680.91x = 25,780.10 × 11,508.18
  4. Step 4: Simplify right side
    18,680.91x = 296,681,973.68
  5. Step 5: Solve for x
    x = 296,681,973.68/18,680.91
  6. Step 6: Final answer
    x = 15,881.56

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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.