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Finding the Fourth Proportional to 16,816.80, 25,228.80 and 5,131.20

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Solution

The fourth proportional to 16,816.80, 25,228.80 and 5,131.20 is: 7,697.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,816.80 : 25,228.80 = 5,131.20 : x
  2. Step 2: Convert to fraction form
    16,816.80/25,228.80 = 5,131.20/x
  3. Step 3: Cross multiply
    16,816.80x = 25,228.80 × 5,131.20
  4. Step 4: Simplify right side
    16,816.80x = 129,454,018.56
  5. Step 5: Solve for x
    x = 129,454,018.56/16,816.80
  6. Step 6: Final answer
    x = 7,697.90

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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.