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Finding the Fourth Proportional to 13,900.44, 20,841.36 and 7,663.44

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Solution

The fourth proportional to 13,900.44, 20,841.36 and 7,663.44 is: 11,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,900.44 : 20,841.36 = 7,663.44 : x
  2. Step 2: Convert to fraction form
    13,900.44/20,841.36 = 7,663.44/x
  3. Step 3: Cross multiply
    13,900.44x = 20,841.36 × 7,663.44
  4. Step 4: Simplify right side
    13,900.44x = 159,716,511.88
  5. Step 5: Solve for x
    x = 159,716,511.88/13,900.44
  6. Step 6: Final answer
    x = 11,490.03

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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.