Home / 3,901.02-5,380.20-2,781.60

Finding the Fourth Proportional to 3,901.02, 5,380.20 and 2,781.60

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Solution

The fourth proportional to 3,901.02, 5,380.20 and 2,781.60 is: 3,836.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,901.02 : 5,380.20 = 2,781.60 : x
  2. Step 2: Convert to fraction form
    3,901.02/5,380.20 = 2,781.60/x
  3. Step 3: Cross multiply
    3,901.02x = 5,380.20 × 2,781.60
  4. Step 4: Simplify right side
    3,901.02x = 14,965,564.32
  5. Step 5: Solve for x
    x = 14,965,564.32/3,901.02
  6. Step 6: Final answer
    x = 3,836.32

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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.