Home / 12,439.08-18,665.10-11,721.96

Finding the Fourth Proportional to 12,439.08, 18,665.10 and 11,721.96

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Solution

The fourth proportional to 12,439.08, 18,665.10 and 11,721.96 is: 17,589.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.08 : 18,665.10 = 11,721.96 : x
  2. Step 2: Convert to fraction form
    12,439.08/18,665.10 = 11,721.96/x
  3. Step 3: Cross multiply
    12,439.08x = 18,665.10 × 11,721.96
  4. Step 4: Simplify right side
    12,439.08x = 218,791,555.60
  5. Step 5: Solve for x
    x = 218,791,555.60/12,439.08
  6. Step 6: Final answer
    x = 17,589.05

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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.