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Finding the Fourth Proportional to 7,071.87, 9,758.79 and 3,927.99

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Solution

The fourth proportional to 7,071.87, 9,758.79 and 3,927.99 is: 5,420.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,071.87 : 9,758.79 = 3,927.99 : x
  2. Step 2: Convert to fraction form
    7,071.87/9,758.79 = 3,927.99/x
  3. Step 3: Cross multiply
    7,071.87x = 9,758.79 × 3,927.99
  4. Step 4: Simplify right side
    7,071.87x = 38,332,429.53
  5. Step 5: Solve for x
    x = 38,332,429.53/7,071.87
  6. Step 6: Final answer
    x = 5,420.41

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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.