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Finding the Fourth Proportional to 12,626.16, 18,937.02 and 3,390

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Solution

The fourth proportional to 12,626.16, 18,937.02 and 3,390 is: 5,084.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,626.16 : 18,937.02 = 3,390 : x
  2. Step 2: Convert to fraction form
    12,626.16/18,937.02 = 3,390/x
  3. Step 3: Cross multiply
    12,626.16x = 18,937.02 × 3,390
  4. Step 4: Simplify right side
    12,626.16x = 64,196,497.80
  5. Step 5: Solve for x
    x = 64,196,497.80/12,626.16
  6. Step 6: Final answer
    x = 5,084.40

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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.