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Finding the Fourth Proportional to 18,419.67, 25,422.48 and 10,865.57

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Solution

The fourth proportional to 18,419.67, 25,422.48 and 10,865.57 is: 14,996.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419.67 : 25,422.48 = 10,865.57 : x
  2. Step 2: Convert to fraction form
    18,419.67/25,422.48 = 10,865.57/x
  3. Step 3: Cross multiply
    18,419.67x = 25,422.48 × 10,865.57
  4. Step 4: Simplify right side
    18,419.67x = 276,229,608.90
  5. Step 5: Solve for x
    x = 276,229,608.90/18,419.67
  6. Step 6: Final answer
    x = 14,996.45

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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.