Home / 5,416.80-8,127.90-2,640.12

Finding the Fourth Proportional to 5,416.80, 8,127.90 and 2,640.12

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Solution

The fourth proportional to 5,416.80, 8,127.90 and 2,640.12 is: 3,961.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,416.80 : 8,127.90 = 2,640.12 : x
  2. Step 2: Convert to fraction form
    5,416.80/8,127.90 = 2,640.12/x
  3. Step 3: Cross multiply
    5,416.80x = 8,127.90 × 2,640.12
  4. Step 4: Simplify right side
    5,416.80x = 21,458,631.35
  5. Step 5: Solve for x
    x = 21,458,631.35/5,416.80
  6. Step 6: Final answer
    x = 3,961.50

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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.