Home / 3,155.73-4,359.32-2,989.66

Finding the Fourth Proportional to 3,155.73, 4,359.32 and 2,989.66

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Solution

The fourth proportional to 3,155.73, 4,359.32 and 2,989.66 is: 4,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,155.73 : 4,359.32 = 2,989.66 : x
  2. Step 2: Convert to fraction form
    3,155.73/4,359.32 = 2,989.66/x
  3. Step 3: Cross multiply
    3,155.73x = 4,359.32 × 2,989.66
  4. Step 4: Simplify right side
    3,155.73x = 13,032,847.89
  5. Step 5: Solve for x
    x = 13,032,847.89/3,155.73
  6. Step 6: Final answer
    x = 4,129.90

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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.