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Finding the Fourth Proportional to 18,781.52, 25,918.26 and 11,329.52

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Solution

The fourth proportional to 18,781.52, 25,918.26 and 11,329.52 is: 15,634.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.52 : 25,918.26 = 11,329.52 : x
  2. Step 2: Convert to fraction form
    18,781.52/25,918.26 = 11,329.52/x
  3. Step 3: Cross multiply
    18,781.52x = 25,918.26 × 11,329.52
  4. Step 4: Simplify right side
    18,781.52x = 293,641,445.04
  5. Step 5: Solve for x
    x = 293,641,445.04/18,781.52
  6. Step 6: Final answer
    x = 15,634.59

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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.