Home / 7,143.19-9,857.05-3,998.95

Finding the Fourth Proportional to 7,143.19, 9,857.05 and 3,998.95

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Solution

The fourth proportional to 7,143.19, 9,857.05 and 3,998.95 is: 5,518.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.19 : 9,857.05 = 3,998.95 : x
  2. Step 2: Convert to fraction form
    7,143.19/9,857.05 = 3,998.95/x
  3. Step 3: Cross multiply
    7,143.19x = 9,857.05 × 3,998.95
  4. Step 4: Simplify right side
    7,143.19x = 39,417,850.10
  5. Step 5: Solve for x
    x = 39,417,850.10/7,143.19
  6. Step 6: Final answer
    x = 5,518.24

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Half scale
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Double scale
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Similar ratio
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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.