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Finding the Fourth Proportional to 26,610.60, 39,908.70 and 7,890.60

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Solution

The fourth proportional to 26,610.60, 39,908.70 and 7,890.60 is: 11,833.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,610.60 : 39,908.70 = 7,890.60 : x
  2. Step 2: Convert to fraction form
    26,610.60/39,908.70 = 7,890.60/x
  3. Step 3: Cross multiply
    26,610.60x = 39,908.70 × 7,890.60
  4. Step 4: Simplify right side
    26,610.60x = 314,903,588.22
  5. Step 5: Solve for x
    x = 314,903,588.22/26,610.60
  6. Step 6: Final answer
    x = 11,833.77

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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.