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Finding the Fourth Proportional to 21,963.30, 32,946.40 and 8,813.96

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Solution

The fourth proportional to 21,963.30, 32,946.40 and 8,813.96 is: 13,221.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,963.30 : 32,946.40 = 8,813.96 : x
  2. Step 2: Convert to fraction form
    21,963.30/32,946.40 = 8,813.96/x
  3. Step 3: Cross multiply
    21,963.30x = 32,946.40 × 8,813.96
  4. Step 4: Simplify right side
    21,963.30x = 290,388,251.74
  5. Step 5: Solve for x
    x = 290,388,251.74/21,963.30
  6. Step 6: Final answer
    x = 13,221.52

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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.