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Finding the Fourth Proportional to 7,110.88, 9,813.05 and 3,924.21

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Solution

The fourth proportional to 7,110.88, 9,813.05 and 3,924.21 is: 5,415.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,110.88 : 9,813.05 = 3,924.21 : x
  2. Step 2: Convert to fraction form
    7,110.88/9,813.05 = 3,924.21/x
  3. Step 3: Cross multiply
    7,110.88x = 9,813.05 × 3,924.21
  4. Step 4: Simplify right side
    7,110.88x = 38,508,468.94
  5. Step 5: Solve for x
    x = 38,508,468.94/7,110.88
  6. Step 6: Final answer
    x = 5,415.43

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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.