Home / 13,922.58-20,889.18-8,379.75

Finding the Fourth Proportional to 13,922.58, 20,889.18 and 8,379.75

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Solution

The fourth proportional to 13,922.58, 20,889.18 and 8,379.75 is: 12,572.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,922.58 : 20,889.18 = 8,379.75 : x
  2. Step 2: Convert to fraction form
    13,922.58/20,889.18 = 8,379.75/x
  3. Step 3: Cross multiply
    13,922.58x = 20,889.18 × 8,379.75
  4. Step 4: Simplify right side
    13,922.58x = 175,046,106.11
  5. Step 5: Solve for x
    x = 175,046,106.11/13,922.58
  6. Step 6: Final answer
    x = 12,572.82

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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.