Home / 3,970.15-5,478.54-2,201.69

Finding the Fourth Proportional to 3,970.15, 5,478.54 and 2,201.69

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Solution

The fourth proportional to 3,970.15, 5,478.54 and 2,201.69 is: 3,038.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.15 : 5,478.54 = 2,201.69 : x
  2. Step 2: Convert to fraction form
    3,970.15/5,478.54 = 2,201.69/x
  3. Step 3: Cross multiply
    3,970.15x = 5,478.54 × 2,201.69
  4. Step 4: Simplify right side
    3,970.15x = 12,062,046.73
  5. Step 5: Solve for x
    x = 12,062,046.73/3,970.15
  6. Step 6: Final answer
    x = 3,038.18

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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.