Home / 20,945.39-28,902.42-11,992.05

Finding the Fourth Proportional to 20,945.39, 28,902.42 and 11,992.05

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Solution

The fourth proportional to 20,945.39, 28,902.42 and 11,992.05 is: 16,547.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.39 : 28,902.42 = 11,992.05 : x
  2. Step 2: Convert to fraction form
    20,945.39/28,902.42 = 11,992.05/x
  3. Step 3: Cross multiply
    20,945.39x = 28,902.42 × 11,992.05
  4. Step 4: Simplify right side
    20,945.39x = 346,599,265.76
  5. Step 5: Solve for x
    x = 346,599,265.76/20,945.39
  6. Step 6: Final answer
    x = 16,547.76

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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.