Home / 20,957.11-31,456.32-15,394.84

Finding the Fourth Proportional to 20,957.11, 31,456.32 and 15,394.84

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Solution

The fourth proportional to 20,957.11, 31,456.32 and 15,394.84 is: 23,107.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.11 : 31,456.32 = 15,394.84 : x
  2. Step 2: Convert to fraction form
    20,957.11/31,456.32 = 15,394.84/x
  3. Step 3: Cross multiply
    20,957.11x = 31,456.32 × 15,394.84
  4. Step 4: Simplify right side
    20,957.11x = 484,264,877.02
  5. Step 5: Solve for x
    x = 484,264,877.02/20,957.11
  6. Step 6: Final answer
    x = 23,107.43

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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.