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Finding the Fourth Proportional to 11,754.72, 16,221.50 and 6,449.63

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Solution

The fourth proportional to 11,754.72, 16,221.50 and 6,449.63 is: 8,900.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,754.72 : 16,221.50 = 6,449.63 : x
  2. Step 2: Convert to fraction form
    11,754.72/16,221.50 = 6,449.63/x
  3. Step 3: Cross multiply
    11,754.72x = 16,221.50 × 6,449.63
  4. Step 4: Simplify right side
    11,754.72x = 104,622,583.88
  5. Step 5: Solve for x
    x = 104,622,583.88/11,754.72
  6. Step 6: Final answer
    x = 8,900.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.