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Finding the Fourth Proportional to 21,652.49, 32,479.65 and 6,861.08

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Solution

The fourth proportional to 21,652.49, 32,479.65 and 6,861.08 is: 10,291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,652.49 : 32,479.65 = 6,861.08 : x
  2. Step 2: Convert to fraction form
    21,652.49/32,479.65 = 6,861.08/x
  3. Step 3: Cross multiply
    21,652.49x = 32,479.65 × 6,861.08
  4. Step 4: Simplify right side
    21,652.49x = 222,845,314.62
  5. Step 5: Solve for x
    x = 222,845,314.62/21,652.49
  6. Step 6: Final answer
    x = 10,291.90

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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.