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Finding the Fourth Proportional to 21,808.78, 32,729.47 and 8,483.87

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Solution

The fourth proportional to 21,808.78, 32,729.47 and 8,483.87 is: 12,732.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808.78 : 32,729.47 = 8,483.87 : x
  2. Step 2: Convert to fraction form
    21,808.78/32,729.47 = 8,483.87/x
  3. Step 3: Cross multiply
    21,808.78x = 32,729.47 × 8,483.87
  4. Step 4: Simplify right side
    21,808.78x = 277,672,629.26
  5. Step 5: Solve for x
    x = 277,672,629.26/21,808.78
  6. Step 6: Final answer
    x = 12,732.15

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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.