Home / 5,428.80-8,143.20-3,314.70

Finding the Fourth Proportional to 5,428.80, 8,143.20 and 3,314.70

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Solution

The fourth proportional to 5,428.80, 8,143.20 and 3,314.70 is: 4,972.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.80 : 8,143.20 = 3,314.70 : x
  2. Step 2: Convert to fraction form
    5,428.80/8,143.20 = 3,314.70/x
  3. Step 3: Cross multiply
    5,428.80x = 8,143.20 × 3,314.70
  4. Step 4: Simplify right side
    5,428.80x = 26,992,265.04
  5. Step 5: Solve for x
    x = 26,992,265.04/5,428.80
  6. Step 6: Final answer
    x = 4,972.05

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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.