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Finding the Fourth Proportional to 13,640.73, 18,858.03 and 13,516.17

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Solution

The fourth proportional to 13,640.73, 18,858.03 and 13,516.17 is: 18,685.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.73 : 18,858.03 = 13,516.17 : x
  2. Step 2: Convert to fraction form
    13,640.73/18,858.03 = 13,516.17/x
  3. Step 3: Cross multiply
    13,640.73x = 18,858.03 × 13,516.17
  4. Step 4: Simplify right side
    13,640.73x = 254,888,339.35
  5. Step 5: Solve for x
    x = 254,888,339.35/13,640.73
  6. Step 6: Final answer
    x = 18,685.83

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1.5x scale

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.