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Finding the Fourth Proportional to 7,911.23, 10,920.09 and 5,553.95

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Solution

The fourth proportional to 7,911.23, 10,920.09 and 5,553.95 is: 7,666.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.23 : 10,920.09 = 5,553.95 : x
  2. Step 2: Convert to fraction form
    7,911.23/10,920.09 = 5,553.95/x
  3. Step 3: Cross multiply
    7,911.23x = 10,920.09 × 5,553.95
  4. Step 4: Simplify right side
    7,911.23x = 60,649,579.26
  5. Step 5: Solve for x
    x = 60,649,579.26/7,911.23
  6. Step 6: Final answer
    x = 7,666.27

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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.