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Finding the Fourth Proportional to 12,267.84, 16,930 and 8,689.22

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Solution

The fourth proportional to 12,267.84, 16,930 and 8,689.22 is: 11,991.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,267.84 : 16,930 = 8,689.22 : x
  2. Step 2: Convert to fraction form
    12,267.84/16,930 = 8,689.22/x
  3. Step 3: Cross multiply
    12,267.84x = 16,930 × 8,689.22
  4. Step 4: Simplify right side
    12,267.84x = 147,108,494.60
  5. Step 5: Solve for x
    x = 147,108,494.60/12,267.84
  6. Step 6: Final answer
    x = 11,991.39

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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.