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Finding the Fourth Proportional to 12,207.70, 16,846.61 and 6,618.70

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Solution

The fourth proportional to 12,207.70, 16,846.61 and 6,618.70 is: 9,133.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,207.70 : 16,846.61 = 6,618.70 : x
  2. Step 2: Convert to fraction form
    12,207.70/16,846.61 = 6,618.70/x
  3. Step 3: Cross multiply
    12,207.70x = 16,846.61 × 6,618.70
  4. Step 4: Simplify right side
    12,207.70x = 111,502,540.28
  5. Step 5: Solve for x
    x = 111,502,540.28/12,207.70
  6. Step 6: Final answer
    x = 9,133.79

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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.