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Finding the Fourth Proportional to 39,804.80, 59,636.79 and 21,043.22

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Solution

The fourth proportional to 39,804.80, 59,636.79 and 21,043.22 is: 31,527.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,804.80 : 59,636.79 = 21,043.22 : x
  2. Step 2: Convert to fraction form
    39,804.80/59,636.79 = 21,043.22/x
  3. Step 3: Cross multiply
    39,804.80x = 59,636.79 × 21,043.22
  4. Step 4: Simplify right side
    39,804.80x = 1,254,949,793.88
  5. Step 5: Solve for x
    x = 1,254,949,793.88/39,804.80
  6. Step 6: Final answer
    x = 31,527.60

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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.