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Finding the Fourth Proportional to 25,430, 38,153.96 and 11,388.88

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Solution

The fourth proportional to 25,430, 38,153.96 and 11,388.88 is: 17,087.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,430 : 38,153.96 = 11,388.88 : x
  2. Step 2: Convert to fraction form
    25,430/38,153.96 = 11,388.88/x
  3. Step 3: Cross multiply
    25,430x = 38,153.96 × 11,388.88
  4. Step 4: Simplify right side
    25,430x = 434,530,871.96
  5. Step 5: Solve for x
    x = 434,530,871.96/25,430
  6. Step 6: Final answer
    x = 17,087.33

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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.