Home / 13,381.88-20,074.05-3,521.21

Finding the Fourth Proportional to 13,381.88, 20,074.05 and 3,521.21

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Solution

The fourth proportional to 13,381.88, 20,074.05 and 3,521.21 is: 5,282.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.88 : 20,074.05 = 3,521.21 : x
  2. Step 2: Convert to fraction form
    13,381.88/20,074.05 = 3,521.21/x
  3. Step 3: Cross multiply
    13,381.88x = 20,074.05 × 3,521.21
  4. Step 4: Simplify right side
    13,381.88x = 70,684,845.23
  5. Step 5: Solve for x
    x = 70,684,845.23/13,381.88
  6. Step 6: Final answer
    x = 5,282.13

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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.