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Finding the Fourth Proportional to 18,289.75, 25,239.86 and 9,906.25

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Solution

The fourth proportional to 18,289.75, 25,239.86 and 9,906.25 is: 13,670.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,289.75 : 25,239.86 = 9,906.25 : x
  2. Step 2: Convert to fraction form
    18,289.75/25,239.86 = 9,906.25/x
  3. Step 3: Cross multiply
    18,289.75x = 25,239.86 × 9,906.25
  4. Step 4: Simplify right side
    18,289.75x = 250,032,313.59
  5. Step 5: Solve for x
    x = 250,032,313.59/18,289.75
  6. Step 6: Final answer
    x = 13,670.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.