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Finding the Fourth Proportional to 11,469.78, 15,828.62 and 6,992.51

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Solution

The fourth proportional to 11,469.78, 15,828.62 and 6,992.51 is: 9,649.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,469.78 : 15,828.62 = 6,992.51 : x
  2. Step 2: Convert to fraction form
    11,469.78/15,828.62 = 6,992.51/x
  3. Step 3: Cross multiply
    11,469.78x = 15,828.62 × 6,992.51
  4. Step 4: Simplify right side
    11,469.78x = 110,681,669.53
  5. Step 5: Solve for x
    x = 110,681,669.53/11,469.78
  6. Step 6: Final answer
    x = 9,649.85

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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.