Home / 7,143.58-9,857.19-3,999.70

Finding the Fourth Proportional to 7,143.58, 9,857.19 and 3,999.70

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Solution

The fourth proportional to 7,143.58, 9,857.19 and 3,999.70 is: 5,519.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.58 : 9,857.19 = 3,999.70 : x
  2. Step 2: Convert to fraction form
    7,143.58/9,857.19 = 3,999.70/x
  3. Step 3: Cross multiply
    7,143.58x = 9,857.19 × 3,999.70
  4. Step 4: Simplify right side
    7,143.58x = 39,425,802.84
  5. Step 5: Solve for x
    x = 39,425,802.84/7,143.58
  6. Step 6: Final answer
    x = 5,519.05

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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.