Home / 20,961.76-28,926.39-11,401.65

Finding the Fourth Proportional to 20,961.76, 28,926.39 and 11,401.65

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Solution

The fourth proportional to 20,961.76, 28,926.39 and 11,401.65 is: 15,733.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.76 : 28,926.39 = 11,401.65 : x
  2. Step 2: Convert to fraction form
    20,961.76/28,926.39 = 11,401.65/x
  3. Step 3: Cross multiply
    20,961.76x = 28,926.39 × 11,401.65
  4. Step 4: Simplify right side
    20,961.76x = 329,808,517.54
  5. Step 5: Solve for x
    x = 329,808,517.54/20,961.76
  6. Step 6: Final answer
    x = 15,733.82

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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.