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Finding the Fourth Proportional to 12,603.44, 18,905.16 and 3,838.43

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Solution

The fourth proportional to 12,603.44, 18,905.16 and 3,838.43 is: 5,757.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.44 : 18,905.16 = 3,838.43 : x
  2. Step 2: Convert to fraction form
    12,603.44/18,905.16 = 3,838.43/x
  3. Step 3: Cross multiply
    12,603.44x = 18,905.16 × 3,838.43
  4. Step 4: Simplify right side
    12,603.44x = 72,566,133.30
  5. Step 5: Solve for x
    x = 72,566,133.30/12,603.44
  6. Step 6: Final answer
    x = 5,757.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.