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Finding the Fourth Proportional to 18,378.97, 25,355.63 and 12,003.39

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Solution

The fourth proportional to 18,378.97, 25,355.63 and 12,003.39 is: 16,559.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.97 : 25,355.63 = 12,003.39 : x
  2. Step 2: Convert to fraction form
    18,378.97/25,355.63 = 12,003.39/x
  3. Step 3: Cross multiply
    18,378.97x = 25,355.63 × 12,003.39
  4. Step 4: Simplify right side
    18,378.97x = 304,353,545.59
  5. Step 5: Solve for x
    x = 304,353,545.59/18,378.97
  6. Step 6: Final answer
    x = 16,559.88

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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.