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Finding the Fourth Proportional to 13,469.78, 18,587.04 and 7,804.75

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Solution

The fourth proportional to 13,469.78, 18,587.04 and 7,804.75 is: 10,769.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,469.78 : 18,587.04 = 7,804.75 : x
  2. Step 2: Convert to fraction form
    13,469.78/18,587.04 = 7,804.75/x
  3. Step 3: Cross multiply
    13,469.78x = 18,587.04 × 7,804.75
  4. Step 4: Simplify right side
    13,469.78x = 145,067,153.97
  5. Step 5: Solve for x
    x = 145,067,153.97/13,469.78
  6. Step 6: Final answer
    x = 10,769.82

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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.