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Finding the Fourth Proportional to 26,918.80, 40,373.40 and 17,040.40

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Solution

The fourth proportional to 26,918.80, 40,373.40 and 17,040.40 is: 25,557.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,918.80 : 40,373.40 = 17,040.40 : x
  2. Step 2: Convert to fraction form
    26,918.80/40,373.40 = 17,040.40/x
  3. Step 3: Cross multiply
    26,918.80x = 40,373.40 × 17,040.40
  4. Step 4: Simplify right side
    26,918.80x = 687,978,885.36
  5. Step 5: Solve for x
    x = 687,978,885.36/26,918.80
  6. Step 6: Final answer
    x = 25,557.56

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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.