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Finding the Fourth Proportional to 7,049.49, 9,728.27 and 3,905.68

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Solution

The fourth proportional to 7,049.49, 9,728.27 and 3,905.68 is: 5,389.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,049.49 : 9,728.27 = 3,905.68 : x
  2. Step 2: Convert to fraction form
    7,049.49/9,728.27 = 3,905.68/x
  3. Step 3: Cross multiply
    7,049.49x = 9,728.27 × 3,905.68
  4. Step 4: Simplify right side
    7,049.49x = 37,995,509.57
  5. Step 5: Solve for x
    x = 37,995,509.57/7,049.49
  6. Step 6: Final answer
    x = 5,389.82

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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.