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Finding the Fourth Proportional to 8,619.01, 12,906.54 and 7,897.30

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Solution

The fourth proportional to 8,619.01, 12,906.54 and 7,897.30 is: 11,825.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.01 : 12,906.54 = 7,897.30 : x
  2. Step 2: Convert to fraction form
    8,619.01/12,906.54 = 7,897.30/x
  3. Step 3: Cross multiply
    8,619.01x = 12,906.54 × 7,897.30
  4. Step 4: Simplify right side
    8,619.01x = 101,926,786.08
  5. Step 5: Solve for x
    x = 101,926,786.08/8,619.01
  6. Step 6: Final answer
    x = 11,825.81

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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.