Home / 4,122.79-5,687.47-2,705.90

Finding the Fourth Proportional to 4,122.79, 5,687.47 and 2,705.90

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Solution

The fourth proportional to 4,122.79, 5,687.47 and 2,705.90 is: 3,732.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,122.79 : 5,687.47 = 2,705.90 : x
  2. Step 2: Convert to fraction form
    4,122.79/5,687.47 = 2,705.90/x
  3. Step 3: Cross multiply
    4,122.79x = 5,687.47 × 2,705.90
  4. Step 4: Simplify right side
    4,122.79x = 15,389,718.31
  5. Step 5: Solve for x
    x = 15,389,718.31/4,122.79
  6. Step 6: Final answer
    x = 3,732.85

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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.