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Finding the Fourth Proportional to 12,603.20, 18,902.40 and 3,838.40

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Solution

The fourth proportional to 12,603.20, 18,902.40 and 3,838.40 is: 5,756.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.20 : 18,902.40 = 3,838.40 : x
  2. Step 2: Convert to fraction form
    12,603.20/18,902.40 = 3,838.40/x
  3. Step 3: Cross multiply
    12,603.20x = 18,902.40 × 3,838.40
  4. Step 4: Simplify right side
    12,603.20x = 72,554,972.16
  5. Step 5: Solve for x
    x = 72,554,972.16/12,603.20
  6. Step 6: Final answer
    x = 5,756.87

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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.