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Finding the Fourth Proportional to 21,751.30, 32,631.80 and 6,961.11

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Solution

The fourth proportional to 21,751.30, 32,631.80 and 6,961.11 is: 10,443.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.30 : 32,631.80 = 6,961.11 : x
  2. Step 2: Convert to fraction form
    21,751.30/32,631.80 = 6,961.11/x
  3. Step 3: Cross multiply
    21,751.30x = 32,631.80 × 6,961.11
  4. Step 4: Simplify right side
    21,751.30x = 227,153,549.30
  5. Step 5: Solve for x
    x = 227,153,549.30/21,751.30
  6. Step 6: Final answer
    x = 10,443.22

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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.