Home / 3,143.96-4,339.20-1,818.47

Finding the Fourth Proportional to 3,143.96, 4,339.20 and 1,818.47

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Solution

The fourth proportional to 3,143.96, 4,339.20 and 1,818.47 is: 2,509.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.96 : 4,339.20 = 1,818.47 : x
  2. Step 2: Convert to fraction form
    3,143.96/4,339.20 = 1,818.47/x
  3. Step 3: Cross multiply
    3,143.96x = 4,339.20 × 1,818.47
  4. Step 4: Simplify right side
    3,143.96x = 7,890,674.24
  5. Step 5: Solve for x
    x = 7,890,674.24/3,143.96
  6. Step 6: Final answer
    x = 2,509.79

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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.