Home / 3,989.56-5,505.51-2,221.06

Finding the Fourth Proportional to 3,989.56, 5,505.51 and 2,221.06

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Solution

The fourth proportional to 3,989.56, 5,505.51 and 2,221.06 is: 3,065.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.56 : 5,505.51 = 2,221.06 : x
  2. Step 2: Convert to fraction form
    3,989.56/5,505.51 = 2,221.06/x
  3. Step 3: Cross multiply
    3,989.56x = 5,505.51 × 2,221.06
  4. Step 4: Simplify right side
    3,989.56x = 12,228,068.04
  5. Step 5: Solve for x
    x = 12,228,068.04/3,989.56
  6. Step 6: Final answer
    x = 3,065.02

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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.