Home / 7,145.87-9,857.21-4,161.38

Finding the Fourth Proportional to 7,145.87, 9,857.21 and 4,161.38

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Solution

The fourth proportional to 7,145.87, 9,857.21 and 4,161.38 is: 5,740.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.87 : 9,857.21 = 4,161.38 : x
  2. Step 2: Convert to fraction form
    7,145.87/9,857.21 = 4,161.38/x
  3. Step 3: Cross multiply
    7,145.87x = 9,857.21 × 4,161.38
  4. Step 4: Simplify right side
    7,145.87x = 41,019,526.46
  5. Step 5: Solve for x
    x = 41,019,526.46/7,145.87
  6. Step 6: Final answer
    x = 5,740.32

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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.