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Finding the Fourth Proportional to 12,207.61, 18,300.61 and 5,278.33

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Solution

The fourth proportional to 12,207.61, 18,300.61 and 5,278.33 is: 7,912.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,207.61 : 18,300.61 = 5,278.33 : x
  2. Step 2: Convert to fraction form
    12,207.61/18,300.61 = 5,278.33/x
  3. Step 3: Cross multiply
    12,207.61x = 18,300.61 × 5,278.33
  4. Step 4: Simplify right side
    12,207.61x = 96,596,658.78
  5. Step 5: Solve for x
    x = 96,596,658.78/12,207.61
  6. Step 6: Final answer
    x = 7,912.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.