Home / 12,499.20-18,736.80-7,228.80

Finding the Fourth Proportional to 12,499.20, 18,736.80 and 7,228.80

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Solution

The fourth proportional to 12,499.20, 18,736.80 and 7,228.80 is: 10,836.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,499.20 : 18,736.80 = 7,228.80 : x
  2. Step 2: Convert to fraction form
    12,499.20/18,736.80 = 7,228.80/x
  3. Step 3: Cross multiply
    12,499.20x = 18,736.80 × 7,228.80
  4. Step 4: Simplify right side
    12,499.20x = 135,444,579.84
  5. Step 5: Solve for x
    x = 135,444,579.84/12,499.20
  6. Step 6: Final answer
    x = 10,836.26

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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.