Home / 3,129.94-4,318.57-1,871.47

Finding the Fourth Proportional to 3,129.94, 4,318.57 and 1,871.47

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Solution

The fourth proportional to 3,129.94, 4,318.57 and 1,871.47 is: 2,582.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.94 : 4,318.57 = 1,871.47 : x
  2. Step 2: Convert to fraction form
    3,129.94/4,318.57 = 1,871.47/x
  3. Step 3: Cross multiply
    3,129.94x = 4,318.57 × 1,871.47
  4. Step 4: Simplify right side
    3,129.94x = 8,082,074.20
  5. Step 5: Solve for x
    x = 8,082,074.20/3,129.94
  6. Step 6: Final answer
    x = 2,582.18

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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.