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Finding the Fourth Proportional to 11,809.09, 17,679.07 and 7,160.77

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Solution

The fourth proportional to 11,809.09, 17,679.07 and 7,160.77 is: 10,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,809.09 : 17,679.07 = 7,160.77 : x
  2. Step 2: Convert to fraction form
    11,809.09/17,679.07 = 7,160.77/x
  3. Step 3: Cross multiply
    11,809.09x = 17,679.07 × 7,160.77
  4. Step 4: Simplify right side
    11,809.09x = 126,595,754.08
  5. Step 5: Solve for x
    x = 126,595,754.08/11,809.09
  6. Step 6: Final answer
    x = 10,720.20

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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.