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Finding the Fourth Proportional to 6,891.11, 9,510.05 and 3,906.89

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Solution

The fourth proportional to 6,891.11, 9,510.05 and 3,906.89 is: 5,391.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.11 : 9,510.05 = 3,906.89 : x
  2. Step 2: Convert to fraction form
    6,891.11/9,510.05 = 3,906.89/x
  3. Step 3: Cross multiply
    6,891.11x = 9,510.05 × 3,906.89
  4. Step 4: Simplify right side
    6,891.11x = 37,154,699.71
  5. Step 5: Solve for x
    x = 37,154,699.71/6,891.11
  6. Step 6: Final answer
    x = 5,391.69

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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.