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Finding the Fourth Proportional to 12,226.70, 16,872.72 and 6,637.70

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Solution

The fourth proportional to 12,226.70, 16,872.72 and 6,637.70 is: 9,159.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,226.70 : 16,872.72 = 6,637.70 : x
  2. Step 2: Convert to fraction form
    12,226.70/16,872.72 = 6,637.70/x
  3. Step 3: Cross multiply
    12,226.70x = 16,872.72 × 6,637.70
  4. Step 4: Simplify right side
    12,226.70x = 111,996,053.54
  5. Step 5: Solve for x
    x = 111,996,053.54/12,226.70
  6. Step 6: Final answer
    x = 9,159.96

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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.