Home / 3,131.90-4,320.25-1,953.66

Finding the Fourth Proportional to 3,131.90, 4,320.25 and 1,953.66

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Solution

The fourth proportional to 3,131.90, 4,320.25 and 1,953.66 is: 2,694.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.90 : 4,320.25 = 1,953.66 : x
  2. Step 2: Convert to fraction form
    3,131.90/4,320.25 = 1,953.66/x
  3. Step 3: Cross multiply
    3,131.90x = 4,320.25 × 1,953.66
  4. Step 4: Simplify right side
    3,131.90x = 8,440,299.62
  5. Step 5: Solve for x
    x = 8,440,299.62/3,131.90
  6. Step 6: Final answer
    x = 2,694.95

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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.