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Finding the Fourth Proportional to 21,957.50, 32,940.41 and 8,810.90

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Solution

The fourth proportional to 21,957.50, 32,940.41 and 8,810.90 is: 13,218.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,957.50 : 32,940.41 = 8,810.90 : x
  2. Step 2: Convert to fraction form
    21,957.50/32,940.41 = 8,810.90/x
  3. Step 3: Cross multiply
    21,957.50x = 32,940.41 × 8,810.90
  4. Step 4: Simplify right side
    21,957.50x = 290,234,658.47
  5. Step 5: Solve for x
    x = 290,234,658.47/21,957.50
  6. Step 6: Final answer
    x = 13,218.02

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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.