Home / 20,986.16-28,954.35-11,910.02

Finding the Fourth Proportional to 20,986.16, 28,954.35 and 11,910.02

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Solution

The fourth proportional to 20,986.16, 28,954.35 and 11,910.02 is: 16,432.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.16 : 28,954.35 = 11,910.02 : x
  2. Step 2: Convert to fraction form
    20,986.16/28,954.35 = 11,910.02/x
  3. Step 3: Cross multiply
    20,986.16x = 28,954.35 × 11,910.02
  4. Step 4: Simplify right side
    20,986.16x = 344,846,742.82
  5. Step 5: Solve for x
    x = 344,846,742.82/20,986.16
  6. Step 6: Final answer
    x = 16,432.11

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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.