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Finding the Fourth Proportional to 18,902.82, 26,081.44 and 15,889.40

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Solution

The fourth proportional to 18,902.82, 26,081.44 and 15,889.40 is: 21,923.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,902.82 : 26,081.44 = 15,889.40 : x
  2. Step 2: Convert to fraction form
    18,902.82/26,081.44 = 15,889.40/x
  3. Step 3: Cross multiply
    18,902.82x = 26,081.44 × 15,889.40
  4. Step 4: Simplify right side
    18,902.82x = 414,418,432.74
  5. Step 5: Solve for x
    x = 414,418,432.74/18,902.82
  6. Step 6: Final answer
    x = 21,923.63

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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.