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Finding the Fourth Proportional to 9,355.11, 12,910.13 and 5,106.21

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Solution

The fourth proportional to 9,355.11, 12,910.13 and 5,106.21 is: 7,046.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,355.11 : 12,910.13 = 5,106.21 : x
  2. Step 2: Convert to fraction form
    9,355.11/12,910.13 = 5,106.21/x
  3. Step 3: Cross multiply
    9,355.11x = 12,910.13 × 5,106.21
  4. Step 4: Simplify right side
    9,355.11x = 65,921,834.91
  5. Step 5: Solve for x
    x = 65,921,834.91/9,355.11
  6. Step 6: Final answer
    x = 7,046.61

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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.