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Finding the Fourth Proportional to 21,804.78, 32,712.62 and 8,652.80

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Solution

The fourth proportional to 21,804.78, 32,712.62 and 8,652.80 is: 12,981.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,804.78 : 32,712.62 = 8,652.80 : x
  2. Step 2: Convert to fraction form
    21,804.78/32,712.62 = 8,652.80/x
  3. Step 3: Cross multiply
    21,804.78x = 32,712.62 × 8,652.80
  4. Step 4: Simplify right side
    21,804.78x = 283,055,758.34
  5. Step 5: Solve for x
    x = 283,055,758.34/21,804.78
  6. Step 6: Final answer
    x = 12,981.36

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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.