Home / 7,105.24-9,805.30-3,918.66

Finding the Fourth Proportional to 7,105.24, 9,805.30 and 3,918.66

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Solution

The fourth proportional to 7,105.24, 9,805.30 and 3,918.66 is: 5,407.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,105.24 : 9,805.30 = 3,918.66 : x
  2. Step 2: Convert to fraction form
    7,105.24/9,805.30 = 3,918.66/x
  3. Step 3: Cross multiply
    7,105.24x = 9,805.30 × 3,918.66
  4. Step 4: Simplify right side
    7,105.24x = 38,423,636.90
  5. Step 5: Solve for x
    x = 38,423,636.90/7,105.24
  6. Step 6: Final answer
    x = 5,407.79

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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.