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Finding the Fourth Proportional to 21,658.62, 32,491.02 and 6,868.82

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Solution

The fourth proportional to 21,658.62, 32,491.02 and 6,868.82 is: 10,304.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.62 : 32,491.02 = 6,868.82 : x
  2. Step 2: Convert to fraction form
    21,658.62/32,491.02 = 6,868.82/x
  3. Step 3: Cross multiply
    21,658.62x = 32,491.02 × 6,868.82
  4. Step 4: Simplify right side
    21,658.62x = 223,174,968.00
  5. Step 5: Solve for x
    x = 223,174,968.00/21,658.62
  6. Step 6: Final answer
    x = 10,304.21

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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.