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Finding the Fourth Proportional to 11,393.82, 15,720.94 and 6,610.99

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Solution

The fourth proportional to 11,393.82, 15,720.94 and 6,610.99 is: 9,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,393.82 : 15,720.94 = 6,610.99 : x
  2. Step 2: Convert to fraction form
    11,393.82/15,720.94 = 6,610.99/x
  3. Step 3: Cross multiply
    11,393.82x = 15,720.94 × 6,610.99
  4. Step 4: Simplify right side
    11,393.82x = 103,930,898.53
  5. Step 5: Solve for x
    x = 103,930,898.53/11,393.82
  6. Step 6: Final answer
    x = 9,121.69

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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.