Home / 2,787.15-4,178.42-2,173.57

Finding the Fourth Proportional to 2,787.15, 4,178.42 and 2,173.57

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Solution

The fourth proportional to 2,787.15, 4,178.42 and 2,173.57 is: 3,258.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.15 : 4,178.42 = 2,173.57 : x
  2. Step 2: Convert to fraction form
    2,787.15/4,178.42 = 2,173.57/x
  3. Step 3: Cross multiply
    2,787.15x = 4,178.42 × 2,173.57
  4. Step 4: Simplify right side
    2,787.15x = 9,082,088.36
  5. Step 5: Solve for x
    x = 9,082,088.36/2,787.15
  6. Step 6: Final answer
    x = 3,258.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.