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Finding the Fourth Proportional to 18,422.75, 27,610.97 and 9,988.94

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Solution

The fourth proportional to 18,422.75, 27,610.97 and 9,988.94 is: 14,970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.75 : 27,610.97 = 9,988.94 : x
  2. Step 2: Convert to fraction form
    18,422.75/27,610.97 = 9,988.94/x
  3. Step 3: Cross multiply
    18,422.75x = 27,610.97 × 9,988.94
  4. Step 4: Simplify right side
    18,422.75x = 275,804,134.67
  5. Step 5: Solve for x
    x = 275,804,134.67/18,422.75
  6. Step 6: Final answer
    x = 14,970.85

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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.