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Finding the Fourth Proportional to 9,086.70, 13,662.45 and 7,661.10

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Solution

The fourth proportional to 9,086.70, 13,662.45 and 7,661.10 is: 11,518.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,086.70 : 13,662.45 = 7,661.10 : x
  2. Step 2: Convert to fraction form
    9,086.70/13,662.45 = 7,661.10/x
  3. Step 3: Cross multiply
    9,086.70x = 13,662.45 × 7,661.10
  4. Step 4: Simplify right side
    9,086.70x = 104,669,395.70
  5. Step 5: Solve for x
    x = 104,669,395.70/9,086.70
  6. Step 6: Final answer
    x = 11,518.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.