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Finding the Fourth Proportional to 25,858.01, 38,789.26 and 7,138.06

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Solution

The fourth proportional to 25,858.01, 38,789.26 and 7,138.06 is: 10,707.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,858.01 : 38,789.26 = 7,138.06 : x
  2. Step 2: Convert to fraction form
    25,858.01/38,789.26 = 7,138.06/x
  3. Step 3: Cross multiply
    25,858.01x = 38,789.26 × 7,138.06
  4. Step 4: Simplify right side
    25,858.01x = 276,880,065.24
  5. Step 5: Solve for x
    x = 276,880,065.24/25,858.01
  6. Step 6: Final answer
    x = 10,707.71

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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.