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Finding the Fourth Proportional to 18,338.76, 25,328.10 and 12,394.96

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Solution

The fourth proportional to 18,338.76, 25,328.10 and 12,394.96 is: 17,118.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,338.76 : 25,328.10 = 12,394.96 : x
  2. Step 2: Convert to fraction form
    18,338.76/25,328.10 = 12,394.96/x
  3. Step 3: Cross multiply
    18,338.76x = 25,328.10 × 12,394.96
  4. Step 4: Simplify right side
    18,338.76x = 313,940,786.38
  5. Step 5: Solve for x
    x = 313,940,786.38/18,338.76
  6. Step 6: Final answer
    x = 17,118.98

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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.