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Finding the Fourth Proportional to 7,166.46, 9,889.39 and 3,979.96

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Solution

The fourth proportional to 7,166.46, 9,889.39 and 3,979.96 is: 5,492.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,166.46 : 9,889.39 = 3,979.96 : x
  2. Step 2: Convert to fraction form
    7,166.46/9,889.39 = 3,979.96/x
  3. Step 3: Cross multiply
    7,166.46x = 9,889.39 × 3,979.96
  4. Step 4: Simplify right side
    7,166.46x = 39,359,356.72
  5. Step 5: Solve for x
    x = 39,359,356.72/7,166.46
  6. Step 6: Final answer
    x = 5,492.16

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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.