Home / 3,100.50-4,276.26-1,920.90

Finding the Fourth Proportional to 3,100.50, 4,276.26 and 1,920.90

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Solution

The fourth proportional to 3,100.50, 4,276.26 and 1,920.90 is: 2,649.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.50 : 4,276.26 = 1,920.90 : x
  2. Step 2: Convert to fraction form
    3,100.50/4,276.26 = 1,920.90/x
  3. Step 3: Cross multiply
    3,100.50x = 4,276.26 × 1,920.90
  4. Step 4: Simplify right side
    3,100.50x = 8,214,267.83
  5. Step 5: Solve for x
    x = 8,214,267.83/3,100.50
  6. Step 6: Final answer
    x = 2,649.34

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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.