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Finding the Fourth Proportional to 7,071.10, 9,758.10 and 3,927.40

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Solution

The fourth proportional to 7,071.10, 9,758.10 and 3,927.40 is: 5,419.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,071.10 : 9,758.10 = 3,927.40 : x
  2. Step 2: Convert to fraction form
    7,071.10/9,758.10 = 3,927.40/x
  3. Step 3: Cross multiply
    7,071.10x = 9,758.10 × 3,927.40
  4. Step 4: Simplify right side
    7,071.10x = 38,323,961.94
  5. Step 5: Solve for x
    x = 38,323,961.94/7,071.10
  6. Step 6: Final answer
    x = 5,419.80

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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.