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Finding the Fourth Proportional to 18,636.47, 27,951.14 and 7,238.40

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Solution

The fourth proportional to 18,636.47, 27,951.14 and 7,238.40 is: 10,856.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.47 : 27,951.14 = 7,238.40 : x
  2. Step 2: Convert to fraction form
    18,636.47/27,951.14 = 7,238.40/x
  3. Step 3: Cross multiply
    18,636.47x = 27,951.14 × 7,238.40
  4. Step 4: Simplify right side
    18,636.47x = 202,321,531.78
  5. Step 5: Solve for x
    x = 202,321,531.78/18,636.47
  6. Step 6: Final answer
    x = 10,856.22

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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.