Home / 3,129.39-4,318.14-2,011.85

Finding the Fourth Proportional to 3,129.39, 4,318.14 and 2,011.85

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Solution

The fourth proportional to 3,129.39, 4,318.14 and 2,011.85 is: 2,776.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.39 : 4,318.14 = 2,011.85 : x
  2. Step 2: Convert to fraction form
    3,129.39/4,318.14 = 2,011.85/x
  3. Step 3: Cross multiply
    3,129.39x = 4,318.14 × 2,011.85
  4. Step 4: Simplify right side
    3,129.39x = 8,687,428.37
  5. Step 5: Solve for x
    x = 8,687,428.37/3,129.39
  6. Step 6: Final answer
    x = 2,776.08

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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.