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Finding the Fourth Proportional to 39,405.80, 59,098.30 and 19,669.80

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Solution

The fourth proportional to 39,405.80, 59,098.30 and 19,669.80 is: 29,499.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,405.80 : 59,098.30 = 19,669.80 : x
  2. Step 2: Convert to fraction form
    39,405.80/59,098.30 = 19,669.80/x
  3. Step 3: Cross multiply
    39,405.80x = 59,098.30 × 19,669.80
  4. Step 4: Simplify right side
    39,405.80x = 1,162,451,741.34
  5. Step 5: Solve for x
    x = 1,162,451,741.34/39,405.80
  6. Step 6: Final answer
    x = 29,499.51

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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.