Home / 9,117.27-13,662.21-8,187.78

Finding the Fourth Proportional to 9,117.27, 13,662.21 and 8,187.78

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Solution

The fourth proportional to 9,117.27, 13,662.21 and 8,187.78 is: 12,269.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,117.27 : 13,662.21 = 8,187.78 : x
  2. Step 2: Convert to fraction form
    9,117.27/13,662.21 = 8,187.78/x
  3. Step 3: Cross multiply
    9,117.27x = 13,662.21 × 8,187.78
  4. Step 4: Simplify right side
    9,117.27x = 111,863,169.79
  5. Step 5: Solve for x
    x = 111,863,169.79/9,117.27
  6. Step 6: Final answer
    x = 12,269.37

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1.5x scale

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.