Home / 20,579.20-28,399.76-12,083.76

Finding the Fourth Proportional to 20,579.20, 28,399.76 and 12,083.76

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Solution

The fourth proportional to 20,579.20, 28,399.76 and 12,083.76 is: 16,675.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.20 : 28,399.76 = 12,083.76 : x
  2. Step 2: Convert to fraction form
    20,579.20/28,399.76 = 12,083.76/x
  3. Step 3: Cross multiply
    20,579.20x = 28,399.76 × 12,083.76
  4. Step 4: Simplify right side
    20,579.20x = 343,175,883.90
  5. Step 5: Solve for x
    x = 343,175,883.90/20,579.20
  6. Step 6: Final answer
    x = 16,675.86

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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.