Home / 3,100.50-4,276.57-1,980.95

Finding the Fourth Proportional to 3,100.50, 4,276.57 and 1,980.95

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Solution

The fourth proportional to 3,100.50, 4,276.57 and 1,980.95 is: 2,732.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.50 : 4,276.57 = 1,980.95 : x
  2. Step 2: Convert to fraction form
    3,100.50/4,276.57 = 1,980.95/x
  3. Step 3: Cross multiply
    3,100.50x = 4,276.57 × 1,980.95
  4. Step 4: Simplify right side
    3,100.50x = 8,471,649.96
  5. Step 5: Solve for x
    x = 8,471,649.96/3,100.50
  6. Step 6: Final answer
    x = 2,732.35

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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.