Home / 20,277.38-27,971.12-12,205.42

Finding the Fourth Proportional to 20,277.38, 27,971.12 and 12,205.42

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Solution

The fourth proportional to 20,277.38, 27,971.12 and 12,205.42 is: 16,836.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,277.38 : 27,971.12 = 12,205.42 : x
  2. Step 2: Convert to fraction form
    20,277.38/27,971.12 = 12,205.42/x
  3. Step 3: Cross multiply
    20,277.38x = 27,971.12 × 12,205.42
  4. Step 4: Simplify right side
    20,277.38x = 341,399,066.59
  5. Step 5: Solve for x
    x = 341,399,066.59/20,277.38
  6. Step 6: Final answer
    x = 16,836.45

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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.