Home / 3,920.50-5,410.02-2,151.76

Finding the Fourth Proportional to 3,920.50, 5,410.02 and 2,151.76

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Solution

The fourth proportional to 3,920.50, 5,410.02 and 2,151.76 is: 2,969.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.50 : 5,410.02 = 2,151.76 : x
  2. Step 2: Convert to fraction form
    3,920.50/5,410.02 = 2,151.76/x
  3. Step 3: Cross multiply
    3,920.50x = 5,410.02 × 2,151.76
  4. Step 4: Simplify right side
    3,920.50x = 11,641,064.64
  5. Step 5: Solve for x
    x = 11,641,064.64/3,920.50
  6. Step 6: Final answer
    x = 2,969.28

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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.