Home / 3,116.40-4,299.48-2,173.20

Finding the Fourth Proportional to 3,116.40, 4,299.48 and 2,173.20

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Solution

The fourth proportional to 3,116.40, 4,299.48 and 2,173.20 is: 2,998.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.40 : 4,299.48 = 2,173.20 : x
  2. Step 2: Convert to fraction form
    3,116.40/4,299.48 = 2,173.20/x
  3. Step 3: Cross multiply
    3,116.40x = 4,299.48 × 2,173.20
  4. Step 4: Simplify right side
    3,116.40x = 9,343,629.94
  5. Step 5: Solve for x
    x = 9,343,629.94/3,116.40
  6. Step 6: Final answer
    x = 2,998.21

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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.