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Finding the Fourth Proportional to 7,103.67, 9,803.10 and 4,121.28

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Solution

The fourth proportional to 7,103.67, 9,803.10 and 4,121.28 is: 5,687.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,103.67 : 9,803.10 = 4,121.28 : x
  2. Step 2: Convert to fraction form
    7,103.67/9,803.10 = 4,121.28/x
  3. Step 3: Cross multiply
    7,103.67x = 9,803.10 × 4,121.28
  4. Step 4: Simplify right side
    7,103.67x = 40,401,319.97
  5. Step 5: Solve for x
    x = 40,401,319.97/7,103.67
  6. Step 6: Final answer
    x = 5,687.39

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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.