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Finding the Fourth Proportional to 25,989.96, 38,978.97 and 7,271.31

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Solution

The fourth proportional to 25,989.96, 38,978.97 and 7,271.31 is: 10,905.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,989.96 : 38,978.97 = 7,271.31 : x
  2. Step 2: Convert to fraction form
    25,989.96/38,978.97 = 7,271.31/x
  3. Step 3: Cross multiply
    25,989.96x = 38,978.97 × 7,271.31
  4. Step 4: Simplify right side
    25,989.96x = 283,428,174.35
  5. Step 5: Solve for x
    x = 283,428,174.35/25,989.96
  6. Step 6: Final answer
    x = 10,905.29

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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.