Home / 12,211.84-18,319.10-3,889.90

Finding the Fourth Proportional to 12,211.84, 18,319.10 and 3,889.90

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Solution

The fourth proportional to 12,211.84, 18,319.10 and 3,889.90 is: 5,835.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.84 : 18,319.10 = 3,889.90 : x
  2. Step 2: Convert to fraction form
    12,211.84/18,319.10 = 3,889.90/x
  3. Step 3: Cross multiply
    12,211.84x = 18,319.10 × 3,889.90
  4. Step 4: Simplify right side
    12,211.84x = 71,259,467.09
  5. Step 5: Solve for x
    x = 71,259,467.09/12,211.84
  6. Step 6: Final answer
    x = 5,835.28

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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.