Home / 3,390.64-5,056.10-3,121.36

Finding the Fourth Proportional to 3,390.64, 5,056.10 and 3,121.36

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Solution

The fourth proportional to 3,390.64, 5,056.10 and 3,121.36 is: 4,654.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.64 : 5,056.10 = 3,121.36 : x
  2. Step 2: Convert to fraction form
    3,390.64/5,056.10 = 3,121.36/x
  3. Step 3: Cross multiply
    3,390.64x = 5,056.10 × 3,121.36
  4. Step 4: Simplify right side
    3,390.64x = 15,781,908.30
  5. Step 5: Solve for x
    x = 15,781,908.30/3,390.64
  6. Step 6: Final answer
    x = 4,654.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.