Home / 20,340.81-28,072.97-11,391.73

Finding the Fourth Proportional to 20,340.81, 28,072.97 and 11,391.73

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Solution

The fourth proportional to 20,340.81, 28,072.97 and 11,391.73 is: 15,722.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.81 : 28,072.97 = 11,391.73 : x
  2. Step 2: Convert to fraction form
    20,340.81/28,072.97 = 11,391.73/x
  3. Step 3: Cross multiply
    20,340.81x = 28,072.97 × 11,391.73
  4. Step 4: Simplify right side
    20,340.81x = 319,799,637.58
  5. Step 5: Solve for x
    x = 319,799,637.58/20,340.81
  6. Step 6: Final answer
    x = 15,722.07

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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.