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Finding the Fourth Proportional to 18,750.54, 28,097.97 and 7,643.64

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Solution

The fourth proportional to 18,750.54, 28,097.97 and 7,643.64 is: 11,454.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.54 : 28,097.97 = 7,643.64 : x
  2. Step 2: Convert to fraction form
    18,750.54/28,097.97 = 7,643.64/x
  3. Step 3: Cross multiply
    18,750.54x = 28,097.97 × 7,643.64
  4. Step 4: Simplify right side
    18,750.54x = 214,770,767.41
  5. Step 5: Solve for x
    x = 214,770,767.41/18,750.54
  6. Step 6: Final answer
    x = 11,454.11

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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.