Home / 3,128.76-4,319.53-1,951.43

Finding the Fourth Proportional to 3,128.76, 4,319.53 and 1,951.43

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Solution

The fourth proportional to 3,128.76, 4,319.53 and 1,951.43 is: 2,694.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.76 : 4,319.53 = 1,951.43 : x
  2. Step 2: Convert to fraction form
    3,128.76/4,319.53 = 1,951.43/x
  3. Step 3: Cross multiply
    3,128.76x = 4,319.53 × 1,951.43
  4. Step 4: Simplify right side
    3,128.76x = 8,429,233.95
  5. Step 5: Solve for x
    x = 8,429,233.95/3,128.76
  6. Step 6: Final answer
    x = 2,694.11

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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.