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Finding the Fourth Proportional to 26,578, 39,891.60 and 13,439.60

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Solution

The fourth proportional to 26,578, 39,891.60 and 13,439.60 is: 20,171.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,578 : 39,891.60 = 13,439.60 : x
  2. Step 2: Convert to fraction form
    26,578/39,891.60 = 13,439.60/x
  3. Step 3: Cross multiply
    26,578x = 39,891.60 × 13,439.60
  4. Step 4: Simplify right side
    26,578x = 536,127,147.36
  5. Step 5: Solve for x
    x = 536,127,147.36/26,578
  6. Step 6: Final answer
    x = 20,171.84

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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.