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Finding the Fourth Proportional to 21,866.79, 32,788.53 and 8,544.33

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Solution

The fourth proportional to 21,866.79, 32,788.53 and 8,544.33 is: 12,811.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.79 : 32,788.53 = 8,544.33 : x
  2. Step 2: Convert to fraction form
    21,866.79/32,788.53 = 8,544.33/x
  3. Step 3: Cross multiply
    21,866.79x = 32,788.53 × 8,544.33
  4. Step 4: Simplify right side
    21,866.79x = 280,156,020.53
  5. Step 5: Solve for x
    x = 280,156,020.53/21,866.79
  6. Step 6: Final answer
    x = 12,811.94

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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.