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Finding the Fourth Proportional to 21,661.88, 32,487.82 and 6,868.04

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Solution

The fourth proportional to 21,661.88, 32,487.82 and 6,868.04 is: 10,300.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.88 : 32,487.82 = 6,868.04 : x
  2. Step 2: Convert to fraction form
    21,661.88/32,487.82 = 6,868.04/x
  3. Step 3: Cross multiply
    21,661.88x = 32,487.82 × 6,868.04
  4. Step 4: Simplify right side
    21,661.88x = 223,127,467.66
  5. Step 5: Solve for x
    x = 223,127,467.66/21,661.88
  6. Step 6: Final answer
    x = 10,300.47

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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.