Home / 20,604.74-28,371.84-18,704.78

Finding the Fourth Proportional to 20,604.74, 28,371.84 and 18,704.78

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Solution

The fourth proportional to 20,604.74, 28,371.84 and 18,704.78 is: 25,755.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.74 : 28,371.84 = 18,704.78 : x
  2. Step 2: Convert to fraction form
    20,604.74/28,371.84 = 18,704.78/x
  3. Step 3: Cross multiply
    20,604.74x = 28,371.84 × 18,704.78
  4. Step 4: Simplify right side
    20,604.74x = 530,689,025.40
  5. Step 5: Solve for x
    x = 530,689,025.40/20,604.74
  6. Step 6: Final answer
    x = 25,755.68

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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.