Home / 31,788.05-43,827.48-20,438.73

Finding the Fourth Proportional to 31,788.05, 43,827.48 and 20,438.73

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Solution

The fourth proportional to 31,788.05, 43,827.48 and 20,438.73 is: 28,179.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,788.05 : 43,827.48 = 20,438.73 : x
  2. Step 2: Convert to fraction form
    31,788.05/43,827.48 = 20,438.73/x
  3. Step 3: Cross multiply
    31,788.05x = 43,827.48 × 20,438.73
  4. Step 4: Simplify right side
    31,788.05x = 895,778,030.30
  5. Step 5: Solve for x
    x = 895,778,030.30/31,788.05
  6. Step 6: Final answer
    x = 28,179.71

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1.5x scale

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.