Home / 13,381.21-18,472.49-9,405.73

Finding the Fourth Proportional to 13,381.21, 18,472.49 and 9,405.73

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Solution

The fourth proportional to 13,381.21, 18,472.49 and 9,405.73 is: 12,984.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.21 : 18,472.49 = 9,405.73 : x
  2. Step 2: Convert to fraction form
    13,381.21/18,472.49 = 9,405.73/x
  3. Step 3: Cross multiply
    13,381.21x = 18,472.49 × 9,405.73
  4. Step 4: Simplify right side
    13,381.21x = 173,747,253.37
  5. Step 5: Solve for x
    x = 173,747,253.37/13,381.21
  6. Step 6: Final answer
    x = 12,984.42

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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.