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Finding the Fourth Proportional to 16,900.80, 25,358.40 and 8,131.20

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Solution

The fourth proportional to 16,900.80, 25,358.40 and 8,131.20 is: 12,200.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,900.80 : 25,358.40 = 8,131.20 : x
  2. Step 2: Convert to fraction form
    16,900.80/25,358.40 = 8,131.20/x
  3. Step 3: Cross multiply
    16,900.80x = 25,358.40 × 8,131.20
  4. Step 4: Simplify right side
    16,900.80x = 206,194,222.08
  5. Step 5: Solve for x
    x = 206,194,222.08/16,900.80
  6. Step 6: Final answer
    x = 12,200.26

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1.5x scale

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.