Home / 3,989.18-5,505.24-2,220.68

Finding the Fourth Proportional to 3,989.18, 5,505.24 and 2,220.68

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Solution

The fourth proportional to 3,989.18, 5,505.24 and 2,220.68 is: 3,064.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.18 : 5,505.24 = 2,220.68 : x
  2. Step 2: Convert to fraction form
    3,989.18/5,505.24 = 2,220.68/x
  3. Step 3: Cross multiply
    3,989.18x = 5,505.24 × 2,220.68
  4. Step 4: Simplify right side
    3,989.18x = 12,225,376.36
  5. Step 5: Solve for x
    x = 12,225,376.36/3,989.18
  6. Step 6: Final answer
    x = 3,064.63

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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.