Home / 2,787.50-3,844.08-2,157.06

Finding the Fourth Proportional to 2,787.50, 3,844.08 and 2,157.06

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Solution

The fourth proportional to 2,787.50, 3,844.08 and 2,157.06 is: 2,974.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.50 : 3,844.08 = 2,157.06 : x
  2. Step 2: Convert to fraction form
    2,787.50/3,844.08 = 2,157.06/x
  3. Step 3: Cross multiply
    2,787.50x = 3,844.08 × 2,157.06
  4. Step 4: Simplify right side
    2,787.50x = 8,291,911.20
  5. Step 5: Solve for x
    x = 8,291,911.20/2,787.50
  6. Step 6: Final answer
    x = 2,974.68

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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.