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Finding the Fourth Proportional to 26,406.90, 39,610.38 and 7,938.90

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Solution

The fourth proportional to 26,406.90, 39,610.38 and 7,938.90 is: 11,908.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,406.90 : 39,610.38 = 7,938.90 : x
  2. Step 2: Convert to fraction form
    26,406.90/39,610.38 = 7,938.90/x
  3. Step 3: Cross multiply
    26,406.90x = 39,610.38 × 7,938.90
  4. Step 4: Simplify right side
    26,406.90x = 314,462,845.78
  5. Step 5: Solve for x
    x = 314,462,845.78/26,406.90
  6. Step 6: Final answer
    x = 11,908.36

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1.5x scale

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.