Home / 13,640.32-20,474.79-12,090.25

Finding the Fourth Proportional to 13,640.32, 20,474.79 and 12,090.25

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Solution

The fourth proportional to 13,640.32, 20,474.79 and 12,090.25 is: 18,148.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.32 : 20,474.79 = 12,090.25 : x
  2. Step 2: Convert to fraction form
    13,640.32/20,474.79 = 12,090.25/x
  3. Step 3: Cross multiply
    13,640.32x = 20,474.79 × 12,090.25
  4. Step 4: Simplify right side
    13,640.32x = 247,545,329.80
  5. Step 5: Solve for x
    x = 247,545,329.80/13,640.32
  6. Step 6: Final answer
    x = 18,148.06

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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.