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Finding the Fourth Proportional to 7,908.97, 10,911.08 and 4,919.61

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Solution

The fourth proportional to 7,908.97, 10,911.08 and 4,919.61 is: 6,787.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.97 : 10,911.08 = 4,919.61 : x
  2. Step 2: Convert to fraction form
    7,908.97/10,911.08 = 4,919.61/x
  3. Step 3: Cross multiply
    7,908.97x = 10,911.08 × 4,919.61
  4. Step 4: Simplify right side
    7,908.97x = 53,678,266.97
  5. Step 5: Solve for x
    x = 53,678,266.97/7,908.97
  6. Step 6: Final answer
    x = 6,787.01

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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.