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Finding the Fourth Proportional to 7,908, 10,913.22 and 5,118.36

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Solution

The fourth proportional to 7,908, 10,913.22 and 5,118.36 is: 7,063.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908 : 10,913.22 = 5,118.36 : x
  2. Step 2: Convert to fraction form
    7,908/10,913.22 = 5,118.36/x
  3. Step 3: Cross multiply
    7,908x = 10,913.22 × 5,118.36
  4. Step 4: Simplify right side
    7,908x = 55,857,788.72
  5. Step 5: Solve for x
    x = 55,857,788.72/7,908
  6. Step 6: Final answer
    x = 7,063.45

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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.