Home / 4,215.78-5,818.17-3,151.70

Finding the Fourth Proportional to 4,215.78, 5,818.17 and 3,151.70

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Solution

The fourth proportional to 4,215.78, 5,818.17 and 3,151.70 is: 4,349.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,215.78 : 5,818.17 = 3,151.70 : x
  2. Step 2: Convert to fraction form
    4,215.78/5,818.17 = 3,151.70/x
  3. Step 3: Cross multiply
    4,215.78x = 5,818.17 × 3,151.70
  4. Step 4: Simplify right side
    4,215.78x = 18,337,114.57
  5. Step 5: Solve for x
    x = 18,337,114.57/4,215.78
  6. Step 6: Final answer
    x = 4,349.64

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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.