Home / 39,740.78-54,842.10-21,835.73

Finding the Fourth Proportional to 39,740.78, 54,842.10 and 21,835.73

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Solution

The fourth proportional to 39,740.78, 54,842.10 and 21,835.73 is: 30,133.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,740.78 : 54,842.10 = 21,835.73 : x
  2. Step 2: Convert to fraction form
    39,740.78/54,842.10 = 21,835.73/x
  3. Step 3: Cross multiply
    39,740.78x = 54,842.10 × 21,835.73
  4. Step 4: Simplify right side
    39,740.78x = 1,197,517,014.02
  5. Step 5: Solve for x
    x = 1,197,517,014.02/39,740.78
  6. Step 6: Final answer
    x = 30,133.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.