Home / 6,640.62-9,173.37-6,290.70

Finding the Fourth Proportional to 6,640.62, 9,173.37 and 6,290.70

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Solution

The fourth proportional to 6,640.62, 9,173.37 and 6,290.70 is: 8,689.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.62 : 9,173.37 = 6,290.70 : x
  2. Step 2: Convert to fraction form
    6,640.62/9,173.37 = 6,290.70/x
  3. Step 3: Cross multiply
    6,640.62x = 9,173.37 × 6,290.70
  4. Step 4: Simplify right side
    6,640.62x = 57,706,918.66
  5. Step 5: Solve for x
    x = 57,706,918.66/6,640.62
  6. Step 6: Final answer
    x = 8,689.99

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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.