Home / 20,635.11-28,477.04-12,137.85

Finding the Fourth Proportional to 20,635.11, 28,477.04 and 12,137.85

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Solution

The fourth proportional to 20,635.11, 28,477.04 and 12,137.85 is: 16,750.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.11 : 28,477.04 = 12,137.85 : x
  2. Step 2: Convert to fraction form
    20,635.11/28,477.04 = 12,137.85/x
  3. Step 3: Cross multiply
    20,635.11x = 28,477.04 × 12,137.85
  4. Step 4: Simplify right side
    20,635.11x = 345,649,979.27
  5. Step 5: Solve for x
    x = 345,649,979.27/20,635.11
  6. Step 6: Final answer
    x = 16,750.58

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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.