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Finding the Fourth Proportional to 7,867.99, 11,806.96 and 7,129.11

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Solution

The fourth proportional to 7,867.99, 11,806.96 and 7,129.11 is: 10,698.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,867.99 : 11,806.96 = 7,129.11 : x
  2. Step 2: Convert to fraction form
    7,867.99/11,806.96 = 7,129.11/x
  3. Step 3: Cross multiply
    7,867.99x = 11,806.96 × 7,129.11
  4. Step 4: Simplify right side
    7,867.99x = 84,173,098.78
  5. Step 5: Solve for x
    x = 84,173,098.78/7,867.99
  6. Step 6: Final answer
    x = 10,698.17

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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.