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Finding the Fourth Proportional to 18,721, 25,837.86 and 11,273.32

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Solution

The fourth proportional to 18,721, 25,837.86 and 11,273.32 is: 15,558.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721 : 25,837.86 = 11,273.32 : x
  2. Step 2: Convert to fraction form
    18,721/25,837.86 = 11,273.32/x
  3. Step 3: Cross multiply
    18,721x = 25,837.86 × 11,273.32
  4. Step 4: Simplify right side
    18,721x = 291,278,463.90
  5. Step 5: Solve for x
    x = 291,278,463.90/18,721
  6. Step 6: Final answer
    x = 15,558.92

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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.