Home / 7,143.22-9,857.91-3,999.43

Finding the Fourth Proportional to 7,143.22, 9,857.91 and 3,999.43

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Solution

The fourth proportional to 7,143.22, 9,857.91 and 3,999.43 is: 5,519.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.22 : 9,857.91 = 3,999.43 : x
  2. Step 2: Convert to fraction form
    7,143.22/9,857.91 = 3,999.43/x
  3. Step 3: Cross multiply
    7,143.22x = 9,857.91 × 3,999.43
  4. Step 4: Simplify right side
    7,143.22x = 39,426,020.99
  5. Step 5: Solve for x
    x = 39,426,020.99/7,143.22
  6. Step 6: Final answer
    x = 5,519.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.