Home / 20,748.82-30,990.92-18,771.40

Finding the Fourth Proportional to 20,748.82, 30,990.92 and 18,771.40

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Solution

The fourth proportional to 20,748.82, 30,990.92 and 18,771.40 is: 28,037.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.82 : 30,990.92 = 18,771.40 : x
  2. Step 2: Convert to fraction form
    20,748.82/30,990.92 = 18,771.40/x
  3. Step 3: Cross multiply
    20,748.82x = 30,990.92 × 18,771.40
  4. Step 4: Simplify right side
    20,748.82x = 581,742,800.73
  5. Step 5: Solve for x
    x = 581,742,800.73/20,748.82
  6. Step 6: Final answer
    x = 28,037.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.