Home / 39,781.73-59,659.83-13,121.73

Finding the Fourth Proportional to 39,781.73, 59,659.83 and 13,121.73

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Solution

The fourth proportional to 39,781.73, 59,659.83 and 13,121.73 is: 19,678.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.73 : 59,659.83 = 13,121.73 : x
  2. Step 2: Convert to fraction form
    39,781.73/59,659.83 = 13,121.73/x
  3. Step 3: Cross multiply
    39,781.73x = 59,659.83 × 13,121.73
  4. Step 4: Simplify right side
    39,781.73x = 782,840,181.11
  5. Step 5: Solve for x
    x = 782,840,181.11/39,781.73
  6. Step 6: Final answer
    x = 19,678.39

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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.