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Finding the Fourth Proportional to 18,552.47, 27,821.78 and 7,455.40

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Solution

The fourth proportional to 18,552.47, 27,821.78 and 7,455.40 is: 11,180.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,552.47 : 27,821.78 = 7,455.40 : x
  2. Step 2: Convert to fraction form
    18,552.47/27,821.78 = 7,455.40/x
  3. Step 3: Cross multiply
    18,552.47x = 27,821.78 × 7,455.40
  4. Step 4: Simplify right side
    18,552.47x = 207,422,461.34
  5. Step 5: Solve for x
    x = 207,422,461.34/18,552.47
  6. Step 6: Final answer
    x = 11,180.32

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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.