Home / 3,129.19-4,318.86-2,011.52

Finding the Fourth Proportional to 3,129.19, 4,318.86 and 2,011.52

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Solution

The fourth proportional to 3,129.19, 4,318.86 and 2,011.52 is: 2,776.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.19 : 4,318.86 = 2,011.52 : x
  2. Step 2: Convert to fraction form
    3,129.19/4,318.86 = 2,011.52/x
  3. Step 3: Cross multiply
    3,129.19x = 4,318.86 × 2,011.52
  4. Step 4: Simplify right side
    3,129.19x = 8,687,473.27
  5. Step 5: Solve for x
    x = 8,687,473.27/3,129.19
  6. Step 6: Final answer
    x = 2,776.27

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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.