Home / 20,811.76-31,184.76-16,897.04

Finding the Fourth Proportional to 20,811.76, 31,184.76 and 16,897.04

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Solution

The fourth proportional to 20,811.76, 31,184.76 and 16,897.04 is: 25,318.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.76 : 31,184.76 = 16,897.04 : x
  2. Step 2: Convert to fraction form
    20,811.76/31,184.76 = 16,897.04/x
  3. Step 3: Cross multiply
    20,811.76x = 31,184.76 × 16,897.04
  4. Step 4: Simplify right side
    20,811.76x = 526,930,137.11
  5. Step 5: Solve for x
    x = 526,930,137.11/20,811.76
  6. Step 6: Final answer
    x = 25,318.86

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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.