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Finding the Fourth Proportional to 26,608, 39,918.78 and 7,888.72

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Solution

The fourth proportional to 26,608, 39,918.78 and 7,888.72 is: 11,835.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,608 : 39,918.78 = 7,888.72 : x
  2. Step 2: Convert to fraction form
    26,608/39,918.78 = 7,888.72/x
  3. Step 3: Cross multiply
    26,608x = 39,918.78 × 7,888.72
  4. Step 4: Simplify right side
    26,608x = 314,908,078.16
  5. Step 5: Solve for x
    x = 314,908,078.16/26,608
  6. Step 6: Final answer
    x = 11,835.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.