Home / 5,185.40-7,155.90-2,827.70

Finding the Fourth Proportional to 5,185.40, 7,155.90 and 2,827.70

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Solution

The fourth proportional to 5,185.40, 7,155.90 and 2,827.70 is: 3,902.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.40 : 7,155.90 = 2,827.70 : x
  2. Step 2: Convert to fraction form
    5,185.40/7,155.90 = 2,827.70/x
  3. Step 3: Cross multiply
    5,185.40x = 7,155.90 × 2,827.70
  4. Step 4: Simplify right side
    5,185.40x = 20,234,738.43
  5. Step 5: Solve for x
    x = 20,234,738.43/5,185.40
  6. Step 6: Final answer
    x = 3,902.25

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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.