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Finding the Fourth Proportional to 9,171.87, 12,657.42 and 5,192.79

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Solution

The fourth proportional to 9,171.87, 12,657.42 and 5,192.79 is: 7,166.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,171.87 : 12,657.42 = 5,192.79 : x
  2. Step 2: Convert to fraction form
    9,171.87/12,657.42 = 5,192.79/x
  3. Step 3: Cross multiply
    9,171.87x = 12,657.42 × 5,192.79
  4. Step 4: Simplify right side
    9,171.87x = 65,727,324.00
  5. Step 5: Solve for x
    x = 65,727,324.00/9,171.87
  6. Step 6: Final answer
    x = 7,166.19

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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.