Home / 19,147.43-28,735.19-12,571.31

Finding the Fourth Proportional to 19,147.43, 28,735.19 and 12,571.31

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Solution

The fourth proportional to 19,147.43, 28,735.19 and 12,571.31 is: 18,866.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,147.43 : 28,735.19 = 12,571.31 : x
  2. Step 2: Convert to fraction form
    19,147.43/28,735.19 = 12,571.31/x
  3. Step 3: Cross multiply
    19,147.43x = 28,735.19 × 12,571.31
  4. Step 4: Simplify right side
    19,147.43x = 361,238,981.40
  5. Step 5: Solve for x
    x = 361,238,981.40/19,147.43
  6. Step 6: Final answer
    x = 18,866.19

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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.