Home / 20,500.68-30,731.76-18,674.64

Finding the Fourth Proportional to 20,500.68, 30,731.76 and 18,674.64

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Solution

The fourth proportional to 20,500.68, 30,731.76 and 18,674.64 is: 27,994.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.68 : 30,731.76 = 18,674.64 : x
  2. Step 2: Convert to fraction form
    20,500.68/30,731.76 = 18,674.64/x
  3. Step 3: Cross multiply
    20,500.68x = 30,731.76 × 18,674.64
  4. Step 4: Simplify right side
    20,500.68x = 573,904,554.57
  5. Step 5: Solve for x
    x = 573,904,554.57/20,500.68
  6. Step 6: Final answer
    x = 27,994.42

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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.