Home / 7,143.66-9,858.26-3,999.92

Finding the Fourth Proportional to 7,143.66, 9,858.26 and 3,999.92

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Solution

The fourth proportional to 7,143.66, 9,858.26 and 3,999.92 is: 5,519.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.66 : 9,858.26 = 3,999.92 : x
  2. Step 2: Convert to fraction form
    7,143.66/9,858.26 = 3,999.92/x
  3. Step 3: Cross multiply
    7,143.66x = 9,858.26 × 3,999.92
  4. Step 4: Simplify right side
    7,143.66x = 39,432,182.05
  5. Step 5: Solve for x
    x = 39,432,182.05/7,143.66
  6. Step 6: Final answer
    x = 5,519.89

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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.