Home / 3,953.60-5,455.20-2,772.80

Finding the Fourth Proportional to 3,953.60, 5,455.20 and 2,772.80

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Solution

The fourth proportional to 3,953.60, 5,455.20 and 2,772.80 is: 3,825.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.60 : 5,455.20 = 2,772.80 : x
  2. Step 2: Convert to fraction form
    3,953.60/5,455.20 = 2,772.80/x
  3. Step 3: Cross multiply
    3,953.60x = 5,455.20 × 2,772.80
  4. Step 4: Simplify right side
    3,953.60x = 15,126,178.56
  5. Step 5: Solve for x
    x = 15,126,178.56/3,953.60
  6. Step 6: Final answer
    x = 3,825.93

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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.