Home / 3,880.53-5,355.06-2,155.76

Finding the Fourth Proportional to 3,880.53, 5,355.06 and 2,155.76

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Solution

The fourth proportional to 3,880.53, 5,355.06 and 2,155.76 is: 2,974.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.53 : 5,355.06 = 2,155.76 : x
  2. Step 2: Convert to fraction form
    3,880.53/5,355.06 = 2,155.76/x
  3. Step 3: Cross multiply
    3,880.53x = 5,355.06 × 2,155.76
  4. Step 4: Simplify right side
    3,880.53x = 11,544,218.76
  5. Step 5: Solve for x
    x = 11,544,218.76/3,880.53
  6. Step 6: Final answer
    x = 2,974.91

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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.