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Finding the Fourth Proportional to 12,215.67, 18,415.10 and 11,401.92

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Solution

The fourth proportional to 12,215.67, 18,415.10 and 11,401.92 is: 17,188.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.67 : 18,415.10 = 11,401.92 : x
  2. Step 2: Convert to fraction form
    12,215.67/18,415.10 = 11,401.92/x
  3. Step 3: Cross multiply
    12,215.67x = 18,415.10 × 11,401.92
  4. Step 4: Simplify right side
    12,215.67x = 209,967,439.98
  5. Step 5: Solve for x
    x = 209,967,439.98/12,215.67
  6. Step 6: Final answer
    x = 17,188.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.