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Finding the Fourth Proportional to 6,805.47, 9,389.95 and 3,971.19

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Solution

The fourth proportional to 6,805.47, 9,389.95 and 3,971.19 is: 5,479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,805.47 : 9,389.95 = 3,971.19 : x
  2. Step 2: Convert to fraction form
    6,805.47/9,389.95 = 3,971.19/x
  3. Step 3: Cross multiply
    6,805.47x = 9,389.95 × 3,971.19
  4. Step 4: Simplify right side
    6,805.47x = 37,289,275.54
  5. Step 5: Solve for x
    x = 37,289,275.54/6,805.47
  6. Step 6: Final answer
    x = 5,479.31

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Double scale
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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.