Home / 20,808.88-28,716.24-13,369.84

Finding the Fourth Proportional to 20,808.88, 28,716.24 and 13,369.84

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Solution

The fourth proportional to 20,808.88, 28,716.24 and 13,369.84 is: 18,450.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.88 : 28,716.24 = 13,369.84 : x
  2. Step 2: Convert to fraction form
    20,808.88/28,716.24 = 13,369.84/x
  3. Step 3: Cross multiply
    20,808.88x = 28,716.24 × 13,369.84
  4. Step 4: Simplify right side
    20,808.88x = 383,931,534.20
  5. Step 5: Solve for x
    x = 383,931,534.20/20,808.88
  6. Step 6: Final answer
    x = 18,450.37

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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.