Home / 7,143.09-9,857.12-4,158.51

Finding the Fourth Proportional to 7,143.09, 9,857.12 and 4,158.51

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Solution

The fourth proportional to 7,143.09, 9,857.12 and 4,158.51 is: 5,738.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.09 : 9,857.12 = 4,158.51 : x
  2. Step 2: Convert to fraction form
    7,143.09/9,857.12 = 4,158.51/x
  3. Step 3: Cross multiply
    7,143.09x = 9,857.12 × 4,158.51
  4. Step 4: Simplify right side
    7,143.09x = 40,990,932.09
  5. Step 5: Solve for x
    x = 40,990,932.09/7,143.09
  6. Step 6: Final answer
    x = 5,738.54

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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.