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Finding the Fourth Proportional to 21,804.88, 32,712.19 and 7,953.88

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Solution

The fourth proportional to 21,804.88, 32,712.19 and 7,953.88 is: 11,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,804.88 : 32,712.19 = 7,953.88 : x
  2. Step 2: Convert to fraction form
    21,804.88/32,712.19 = 7,953.88/x
  3. Step 3: Cross multiply
    21,804.88x = 32,712.19 × 7,953.88
  4. Step 4: Simplify right side
    21,804.88x = 260,188,833.80
  5. Step 5: Solve for x
    x = 260,188,833.80/21,804.88
  6. Step 6: Final answer
    x = 11,932.60

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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.