Home / 13,661.80-18,835.92-9,178.44

Finding the Fourth Proportional to 13,661.80, 18,835.92 and 9,178.44

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Solution

The fourth proportional to 13,661.80, 18,835.92 and 9,178.44 is: 12,654.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.80 : 18,835.92 = 9,178.44 : x
  2. Step 2: Convert to fraction form
    13,661.80/18,835.92 = 9,178.44/x
  3. Step 3: Cross multiply
    13,661.80x = 18,835.92 × 9,178.44
  4. Step 4: Simplify right side
    13,661.80x = 172,884,361.56
  5. Step 5: Solve for x
    x = 172,884,361.56/13,661.80
  6. Step 6: Final answer
    x = 12,654.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.