Home / 20,811.76-28,717.94-12,314.20

Finding the Fourth Proportional to 20,811.76, 28,717.94 and 12,314.20

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Solution

The fourth proportional to 20,811.76, 28,717.94 and 12,314.20 is: 16,992.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.76 : 28,717.94 = 12,314.20 : x
  2. Step 2: Convert to fraction form
    20,811.76/28,717.94 = 12,314.20/x
  3. Step 3: Cross multiply
    20,811.76x = 28,717.94 × 12,314.20
  4. Step 4: Simplify right side
    20,811.76x = 353,638,456.75
  5. Step 5: Solve for x
    x = 353,638,456.75/20,811.76
  6. Step 6: Final answer
    x = 16,992.24

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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.