Home / 20,680.09-28,530.79-12,177.01

Finding the Fourth Proportional to 20,680.09, 28,530.79 and 12,177.01

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Solution

The fourth proportional to 20,680.09, 28,530.79 and 12,177.01 is: 16,799.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.09 : 28,530.79 = 12,177.01 : x
  2. Step 2: Convert to fraction form
    20,680.09/28,530.79 = 12,177.01/x
  3. Step 3: Cross multiply
    20,680.09x = 28,530.79 × 12,177.01
  4. Step 4: Simplify right side
    20,680.09x = 347,419,654.25
  5. Step 5: Solve for x
    x = 347,419,654.25/20,680.09
  6. Step 6: Final answer
    x = 16,799.72

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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.