Home / 13,620.16-20,439.96-4,855.15

Finding the Fourth Proportional to 13,620.16, 20,439.96 and 4,855.15

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Solution

The fourth proportional to 13,620.16, 20,439.96 and 4,855.15 is: 7,286.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.16 : 20,439.96 = 4,855.15 : x
  2. Step 2: Convert to fraction form
    13,620.16/20,439.96 = 4,855.15/x
  3. Step 3: Cross multiply
    13,620.16x = 20,439.96 × 4,855.15
  4. Step 4: Simplify right side
    13,620.16x = 99,239,071.79
  5. Step 5: Solve for x
    x = 99,239,071.79/13,620.16
  6. Step 6: Final answer
    x = 7,286.19

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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.