Home / 12,784.40-19,183.80-4,992.20

Finding the Fourth Proportional to 12,784.40, 19,183.80 and 4,992.20

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Solution

The fourth proportional to 12,784.40, 19,183.80 and 4,992.20 is: 7,491.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,784.40 : 19,183.80 = 4,992.20 : x
  2. Step 2: Convert to fraction form
    12,784.40/19,183.80 = 4,992.20/x
  3. Step 3: Cross multiply
    12,784.40x = 19,183.80 × 4,992.20
  4. Step 4: Simplify right side
    12,784.40x = 95,769,366.36
  5. Step 5: Solve for x
    x = 95,769,366.36/12,784.40
  6. Step 6: Final answer
    x = 7,491.11

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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.