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Finding the Fourth Proportional to 11,208.71, 15,469.79 and 7,391.49

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Solution

The fourth proportional to 11,208.71, 15,469.79 and 7,391.49 is: 10,201.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,208.71 : 15,469.79 = 7,391.49 : x
  2. Step 2: Convert to fraction form
    11,208.71/15,469.79 = 7,391.49/x
  3. Step 3: Cross multiply
    11,208.71x = 15,469.79 × 7,391.49
  4. Step 4: Simplify right side
    11,208.71x = 114,344,703.12
  5. Step 5: Solve for x
    x = 114,344,703.12/11,208.71
  6. Step 6: Final answer
    x = 10,201.41

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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.