Home / 31,390.33-47,085.39-19,711.75

Finding the Fourth Proportional to 31,390.33, 47,085.39 and 19,711.75

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Solution

The fourth proportional to 31,390.33, 47,085.39 and 19,711.75 is: 29,567.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,390.33 : 47,085.39 = 19,711.75 : x
  2. Step 2: Convert to fraction form
    31,390.33/47,085.39 = 19,711.75/x
  3. Step 3: Cross multiply
    31,390.33x = 47,085.39 × 19,711.75
  4. Step 4: Simplify right side
    31,390.33x = 928,135,436.33
  5. Step 5: Solve for x
    x = 928,135,436.33/31,390.33
  6. Step 6: Final answer
    x = 29,567.56

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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.