Home / 3,147.81-4,342.71-2,029.40

Finding the Fourth Proportional to 3,147.81, 4,342.71 and 2,029.40

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Solution

The fourth proportional to 3,147.81, 4,342.71 and 2,029.40 is: 2,799.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.81 : 4,342.71 = 2,029.40 : x
  2. Step 2: Convert to fraction form
    3,147.81/4,342.71 = 2,029.40/x
  3. Step 3: Cross multiply
    3,147.81x = 4,342.71 × 2,029.40
  4. Step 4: Simplify right side
    3,147.81x = 8,813,097.86
  5. Step 5: Solve for x
    x = 8,813,097.86/3,147.81
  6. Step 6: Final answer
    x = 2,799.76

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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.