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Finding the Fourth Proportional to 12,661.97, 18,987.17 and 5,262.01

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Solution

The fourth proportional to 12,661.97, 18,987.17 and 5,262.01 is: 7,890.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.97 : 18,987.17 = 5,262.01 : x
  2. Step 2: Convert to fraction form
    12,661.97/18,987.17 = 5,262.01/x
  3. Step 3: Cross multiply
    12,661.97x = 18,987.17 × 5,262.01
  4. Step 4: Simplify right side
    12,661.97x = 99,910,644.10
  5. Step 5: Solve for x
    x = 99,910,644.10/12,661.97
  6. Step 6: Final answer
    x = 7,890.61

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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.