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Finding the Fourth Proportional to 7,103.68, 9,803.84 and 3,917.30

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Solution

The fourth proportional to 7,103.68, 9,803.84 and 3,917.30 is: 5,406.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,103.68 : 9,803.84 = 3,917.30 : x
  2. Step 2: Convert to fraction form
    7,103.68/9,803.84 = 3,917.30/x
  3. Step 3: Cross multiply
    7,103.68x = 9,803.84 × 3,917.30
  4. Step 4: Simplify right side
    7,103.68x = 38,404,513.83
  5. Step 5: Solve for x
    x = 38,404,513.83/7,103.68
  6. Step 6: Final answer
    x = 5,406.29

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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.