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Finding the Fourth Proportional to 6,640.70, 9,962.36 and 1,960.79

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Solution

The fourth proportional to 6,640.70, 9,962.36 and 1,960.79 is: 2,941.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.70 : 9,962.36 = 1,960.79 : x
  2. Step 2: Convert to fraction form
    6,640.70/9,962.36 = 1,960.79/x
  3. Step 3: Cross multiply
    6,640.70x = 9,962.36 × 1,960.79
  4. Step 4: Simplify right side
    6,640.70x = 19,534,036.25
  5. Step 5: Solve for x
    x = 19,534,036.25/6,640.70
  6. Step 6: Final answer
    x = 2,941.57

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Similar ratio
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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.