Home / 7,143.08-9,857.64-3,998.96

Finding the Fourth Proportional to 7,143.08, 9,857.64 and 3,998.96

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Solution

The fourth proportional to 7,143.08, 9,857.64 and 3,998.96 is: 5,518.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.08 : 9,857.64 = 3,998.96 : x
  2. Step 2: Convert to fraction form
    7,143.08/9,857.64 = 3,998.96/x
  3. Step 3: Cross multiply
    7,143.08x = 9,857.64 × 3,998.96
  4. Step 4: Simplify right side
    7,143.08x = 39,420,308.05
  5. Step 5: Solve for x
    x = 39,420,308.05/7,143.08
  6. Step 6: Final answer
    x = 5,518.67

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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.