Home / 3,143.81-4,338.38-1,817.76

Finding the Fourth Proportional to 3,143.81, 4,338.38 and 1,817.76

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Solution

The fourth proportional to 3,143.81, 4,338.38 and 1,817.76 is: 2,508.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.81 : 4,338.38 = 1,817.76 : x
  2. Step 2: Convert to fraction form
    3,143.81/4,338.38 = 1,817.76/x
  3. Step 3: Cross multiply
    3,143.81x = 4,338.38 × 1,817.76
  4. Step 4: Simplify right side
    3,143.81x = 7,886,124.54
  5. Step 5: Solve for x
    x = 7,886,124.54/3,143.81
  6. Step 6: Final answer
    x = 2,508.46

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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.