Home / 12,721.43-19,078.50-4,287.02

Finding the Fourth Proportional to 12,721.43, 19,078.50 and 4,287.02

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Solution

The fourth proportional to 12,721.43, 19,078.50 and 4,287.02 is: 6,429.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.43 : 19,078.50 = 4,287.02 : x
  2. Step 2: Convert to fraction form
    12,721.43/19,078.50 = 4,287.02/x
  3. Step 3: Cross multiply
    12,721.43x = 19,078.50 × 4,287.02
  4. Step 4: Simplify right side
    12,721.43x = 81,789,794.24
  5. Step 5: Solve for x
    x = 81,789,794.24/12,721.43
  6. Step 6: Final answer
    x = 6,429.29

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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.