Home / 11,391.54-15,711.83-8,365.71

Finding the Fourth Proportional to 11,391.54, 15,711.83 and 8,365.71

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Solution

The fourth proportional to 11,391.54, 15,711.83 and 8,365.71 is: 11,538.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.54 : 15,711.83 = 8,365.71 : x
  2. Step 2: Convert to fraction form
    11,391.54/15,711.83 = 8,365.71/x
  3. Step 3: Cross multiply
    11,391.54x = 15,711.83 × 8,365.71
  4. Step 4: Simplify right side
    11,391.54x = 131,440,613.35
  5. Step 5: Solve for x
    x = 131,440,613.35/11,391.54
  6. Step 6: Final answer
    x = 11,538.44

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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.