Home / 3,420.27-4,718.81-2,789.71

Finding the Fourth Proportional to 3,420.27, 4,718.81 and 2,789.71

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Solution

The fourth proportional to 3,420.27, 4,718.81 and 2,789.71 is: 3,848.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.27 : 4,718.81 = 2,789.71 : x
  2. Step 2: Convert to fraction form
    3,420.27/4,718.81 = 2,789.71/x
  3. Step 3: Cross multiply
    3,420.27x = 4,718.81 × 2,789.71
  4. Step 4: Simplify right side
    3,420.27x = 13,164,106.62
  5. Step 5: Solve for x
    x = 13,164,106.62/3,420.27
  6. Step 6: Final answer
    x = 3,848.85

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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.