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Finding the Fourth Proportional to 21,660.75, 32,491.13 and 5,244.75

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Solution

The fourth proportional to 21,660.75, 32,491.13 and 5,244.75 is: 7,867.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.75 : 32,491.13 = 5,244.75 : x
  2. Step 2: Convert to fraction form
    21,660.75/32,491.13 = 5,244.75/x
  3. Step 3: Cross multiply
    21,660.75x = 32,491.13 × 5,244.75
  4. Step 4: Simplify right side
    21,660.75x = 170,407,827.84
  5. Step 5: Solve for x
    x = 170,407,827.84/21,660.75
  6. Step 6: Final answer
    x = 7,867.13

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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.