Home / 4,811.28-6,640.12-2,687.60

Finding the Fourth Proportional to 4,811.28, 6,640.12 and 2,687.60

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Solution

The fourth proportional to 4,811.28, 6,640.12 and 2,687.60 is: 3,709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,811.28 : 6,640.12 = 2,687.60 : x
  2. Step 2: Convert to fraction form
    4,811.28/6,640.12 = 2,687.60/x
  3. Step 3: Cross multiply
    4,811.28x = 6,640.12 × 2,687.60
  4. Step 4: Simplify right side
    4,811.28x = 17,845,986.51
  5. Step 5: Solve for x
    x = 17,845,986.51/4,811.28
  6. Step 6: Final answer
    x = 3,709.20

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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.