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Finding the Fourth Proportional to 18,789.78, 25,924.05 and 12,503.22

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Solution

The fourth proportional to 18,789.78, 25,924.05 and 12,503.22 is: 17,250.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.78 : 25,924.05 = 12,503.22 : x
  2. Step 2: Convert to fraction form
    18,789.78/25,924.05 = 12,503.22/x
  3. Step 3: Cross multiply
    18,789.78x = 25,924.05 × 12,503.22
  4. Step 4: Simplify right side
    18,789.78x = 324,134,100.44
  5. Step 5: Solve for x
    x = 324,134,100.44/18,789.78
  6. Step 6: Final answer
    x = 17,250.55

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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.