Home / 20,191.78-27,865.96-11,239.25

Finding the Fourth Proportional to 20,191.78, 27,865.96 and 11,239.25

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Solution

The fourth proportional to 20,191.78, 27,865.96 and 11,239.25 is: 15,510.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.78 : 27,865.96 = 11,239.25 : x
  2. Step 2: Convert to fraction form
    20,191.78/27,865.96 = 11,239.25/x
  3. Step 3: Cross multiply
    20,191.78x = 27,865.96 × 11,239.25
  4. Step 4: Simplify right side
    20,191.78x = 313,192,490.93
  5. Step 5: Solve for x
    x = 313,192,490.93/20,191.78
  6. Step 6: Final answer
    x = 15,510.89

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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.