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Finding the Fourth Proportional to 18,396.80, 25,390.08 and 10,944

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Solution

The fourth proportional to 18,396.80, 25,390.08 and 10,944 is: 15,104.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,396.80 : 25,390.08 = 10,944 : x
  2. Step 2: Convert to fraction form
    18,396.80/25,390.08 = 10,944/x
  3. Step 3: Cross multiply
    18,396.80x = 25,390.08 × 10,944
  4. Step 4: Simplify right side
    18,396.80x = 277,869,035.52
  5. Step 5: Solve for x
    x = 277,869,035.52/18,396.80
  6. Step 6: Final answer
    x = 15,104.20

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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.