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Finding the Fourth Proportional to 21,326.38, 31,975.88 and 8,855.01

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Solution

The fourth proportional to 21,326.38, 31,975.88 and 8,855.01 is: 13,276.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,326.38 : 31,975.88 = 8,855.01 : x
  2. Step 2: Convert to fraction form
    21,326.38/31,975.88 = 8,855.01/x
  3. Step 3: Cross multiply
    21,326.38x = 31,975.88 × 8,855.01
  4. Step 4: Simplify right side
    21,326.38x = 283,146,742.69
  5. Step 5: Solve for x
    x = 283,146,742.69/21,326.38
  6. Step 6: Final answer
    x = 13,276.83

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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.