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Finding the Fourth Proportional to 21,122.88, 31,677.92 and 8,808

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Solution

The fourth proportional to 21,122.88, 31,677.92 and 8,808 is: 13,209.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.88 : 31,677.92 = 8,808 : x
  2. Step 2: Convert to fraction form
    21,122.88/31,677.92 = 8,808/x
  3. Step 3: Cross multiply
    21,122.88x = 31,677.92 × 8,808
  4. Step 4: Simplify right side
    21,122.88x = 279,019,119.36
  5. Step 5: Solve for x
    x = 279,019,119.36/21,122.88
  6. Step 6: Final answer
    x = 13,209.33

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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.