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Finding the Fourth Proportional to 6,963.93, 9,610.91 and 3,980.19

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Solution

The fourth proportional to 6,963.93, 9,610.91 and 3,980.19 is: 5,493.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,963.93 : 9,610.91 = 3,980.19 : x
  2. Step 2: Convert to fraction form
    6,963.93/9,610.91 = 3,980.19/x
  3. Step 3: Cross multiply
    6,963.93x = 9,610.91 × 3,980.19
  4. Step 4: Simplify right side
    6,963.93x = 38,253,247.87
  5. Step 5: Solve for x
    x = 38,253,247.87/6,963.93
  6. Step 6: Final answer
    x = 5,493.06

Related Problems

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Half scale
Find fourth proportional to 13,927.86, 19,221.82 and 7,960.38
Double scale
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Similar ratio
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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.