Home / 12,879.24-19,320-5,086.20

Finding the Fourth Proportional to 12,879.24, 19,320 and 5,086.20

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Solution

The fourth proportional to 12,879.24, 19,320 and 5,086.20 is: 7,629.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.24 : 19,320 = 5,086.20 : x
  2. Step 2: Convert to fraction form
    12,879.24/19,320 = 5,086.20/x
  3. Step 3: Cross multiply
    12,879.24x = 19,320 × 5,086.20
  4. Step 4: Simplify right side
    12,879.24x = 98,265,384
  5. Step 5: Solve for x
    x = 98,265,384/12,879.24
  6. Step 6: Final answer
    x = 7,629.75

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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.