Home / 20,961.86-28,924.17-11,886.71

Finding the Fourth Proportional to 20,961.86, 28,924.17 and 11,886.71

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Solution

The fourth proportional to 20,961.86, 28,924.17 and 11,886.71 is: 16,401.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.86 : 28,924.17 = 11,886.71 : x
  2. Step 2: Convert to fraction form
    20,961.86/28,924.17 = 11,886.71/x
  3. Step 3: Cross multiply
    20,961.86x = 28,924.17 × 11,886.71
  4. Step 4: Simplify right side
    20,961.86x = 343,813,076.16
  5. Step 5: Solve for x
    x = 343,813,076.16/20,961.86
  6. Step 6: Final answer
    x = 16,401.84

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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.