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Finding the Fourth Proportional to 7,105.57, 9,805.25 and 3,918.74

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Solution

The fourth proportional to 7,105.57, 9,805.25 and 3,918.74 is: 5,407.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,105.57 : 9,805.25 = 3,918.74 : x
  2. Step 2: Convert to fraction form
    7,105.57/9,805.25 = 3,918.74/x
  3. Step 3: Cross multiply
    7,105.57x = 9,805.25 × 3,918.74
  4. Step 4: Simplify right side
    7,105.57x = 38,424,186.16
  5. Step 5: Solve for x
    x = 38,424,186.16/7,105.57
  6. Step 6: Final answer
    x = 5,407.62

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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.