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Finding the Fourth Proportional to 12,640.14, 18,963.54 and 4,320.14

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Solution

The fourth proportional to 12,640.14, 18,963.54 and 4,320.14 is: 6,481.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.14 : 18,963.54 = 4,320.14 : x
  2. Step 2: Convert to fraction form
    12,640.14/18,963.54 = 4,320.14/x
  3. Step 3: Cross multiply
    12,640.14x = 18,963.54 × 4,320.14
  4. Step 4: Simplify right side
    12,640.14x = 81,925,147.70
  5. Step 5: Solve for x
    x = 81,925,147.70/12,640.14
  6. Step 6: Final answer
    x = 6,481.35

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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.