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Finding the Fourth Proportional to 12,889.22, 17,786.88 and 7,223.94

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Solution

The fourth proportional to 12,889.22, 17,786.88 and 7,223.94 is: 9,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.22 : 17,786.88 = 7,223.94 : x
  2. Step 2: Convert to fraction form
    12,889.22/17,786.88 = 7,223.94/x
  3. Step 3: Cross multiply
    12,889.22x = 17,786.88 × 7,223.94
  4. Step 4: Simplify right side
    12,889.22x = 128,491,353.91
  5. Step 5: Solve for x
    x = 128,491,353.91/12,889.22
  6. Step 6: Final answer
    x = 9,968.90

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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.