Home / 20,850.32-28,776.80-11,898.20

Finding the Fourth Proportional to 20,850.32, 28,776.80 and 11,898.20

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Solution

The fourth proportional to 20,850.32, 28,776.80 and 11,898.20 is: 16,421.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.32 : 28,776.80 = 11,898.20 : x
  2. Step 2: Convert to fraction form
    20,850.32/28,776.80 = 11,898.20/x
  3. Step 3: Cross multiply
    20,850.32x = 28,776.80 × 11,898.20
  4. Step 4: Simplify right side
    20,850.32x = 342,392,121.76
  5. Step 5: Solve for x
    x = 342,392,121.76/20,850.32
  6. Step 6: Final answer
    x = 16,421.43

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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.