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Finding the Fourth Proportional to 11,940.21, 17,910.41 and 7,560.72

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Solution

The fourth proportional to 11,940.21, 17,910.41 and 7,560.72 is: 11,341.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,940.21 : 17,910.41 = 7,560.72 : x
  2. Step 2: Convert to fraction form
    11,940.21/17,910.41 = 7,560.72/x
  3. Step 3: Cross multiply
    11,940.21x = 17,910.41 × 7,560.72
  4. Step 4: Simplify right side
    11,940.21x = 135,415,557.29
  5. Step 5: Solve for x
    x = 135,415,557.29/11,940.21
  6. Step 6: Final answer
    x = 11,341.14

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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.