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Finding the Fourth Proportional to 8,653.67, 11,942.19 and 5,117.21

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Solution

The fourth proportional to 8,653.67, 11,942.19 and 5,117.21 is: 7,061.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653.67 : 11,942.19 = 5,117.21 : x
  2. Step 2: Convert to fraction form
    8,653.67/11,942.19 = 5,117.21/x
  3. Step 3: Cross multiply
    8,653.67x = 11,942.19 × 5,117.21
  4. Step 4: Simplify right side
    8,653.67x = 61,110,694.09
  5. Step 5: Solve for x
    x = 61,110,694.09/8,653.67
  6. Step 6: Final answer
    x = 7,061.82

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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.