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Finding the Fourth Proportional to 21,244.80, 31,868.80 and 5,662.08

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Solution

The fourth proportional to 21,244.80, 31,868.80 and 5,662.08 is: 8,493.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,244.80 : 31,868.80 = 5,662.08 : x
  2. Step 2: Convert to fraction form
    21,244.80/31,868.80 = 5,662.08/x
  3. Step 3: Cross multiply
    21,244.80x = 31,868.80 × 5,662.08
  4. Step 4: Simplify right side
    21,244.80x = 180,443,695.10
  5. Step 5: Solve for x
    x = 180,443,695.10/21,244.80
  6. Step 6: Final answer
    x = 8,493.55

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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.