Home / 7,143.30-9,857.07-3,998.88

Finding the Fourth Proportional to 7,143.30, 9,857.07 and 3,998.88

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Solution

The fourth proportional to 7,143.30, 9,857.07 and 3,998.88 is: 5,518.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.30 : 9,857.07 = 3,998.88 : x
  2. Step 2: Convert to fraction form
    7,143.30/9,857.07 = 3,998.88/x
  3. Step 3: Cross multiply
    7,143.30x = 9,857.07 × 3,998.88
  4. Step 4: Simplify right side
    7,143.30x = 39,417,240.08
  5. Step 5: Solve for x
    x = 39,417,240.08/7,143.30
  6. Step 6: Final answer
    x = 5,518.07

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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.