Home / 4,428.16-6,629.60-3,990.40

Finding the Fourth Proportional to 4,428.16, 6,629.60 and 3,990.40

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Solution

The fourth proportional to 4,428.16, 6,629.60 and 3,990.40 is: 5,974.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,428.16 : 6,629.60 = 3,990.40 : x
  2. Step 2: Convert to fraction form
    4,428.16/6,629.60 = 3,990.40/x
  3. Step 3: Cross multiply
    4,428.16x = 6,629.60 × 3,990.40
  4. Step 4: Simplify right side
    4,428.16x = 26,454,755.84
  5. Step 5: Solve for x
    x = 26,454,755.84/4,428.16
  6. Step 6: Final answer
    x = 5,974.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.