Home / 3,143.67-4,338.79-1,818.18

Finding the Fourth Proportional to 3,143.67, 4,338.79 and 1,818.18

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Solution

The fourth proportional to 3,143.67, 4,338.79 and 1,818.18 is: 2,509.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.67 : 4,338.79 = 1,818.18 : x
  2. Step 2: Convert to fraction form
    3,143.67/4,338.79 = 1,818.18/x
  3. Step 3: Cross multiply
    3,143.67x = 4,338.79 × 1,818.18
  4. Step 4: Simplify right side
    3,143.67x = 7,888,701.20
  5. Step 5: Solve for x
    x = 7,888,701.20/3,143.67
  6. Step 6: Final answer
    x = 2,509.39

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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.