Home / 13,935.40-20,902.72-3,405.48

Finding the Fourth Proportional to 13,935.40, 20,902.72 and 3,405.48

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Solution

The fourth proportional to 13,935.40, 20,902.72 and 3,405.48 is: 5,108.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,935.40 : 20,902.72 = 3,405.48 : x
  2. Step 2: Convert to fraction form
    13,935.40/20,902.72 = 3,405.48/x
  3. Step 3: Cross multiply
    13,935.40x = 20,902.72 × 3,405.48
  4. Step 4: Simplify right side
    13,935.40x = 71,183,794.91
  5. Step 5: Solve for x
    x = 71,183,794.91/13,935.40
  6. Step 6: Final answer
    x = 5,108.13

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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.