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Finding the Fourth Proportional to 18,456.57, 25,469.28 and 10,905.33

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Solution

The fourth proportional to 18,456.57, 25,469.28 and 10,905.33 is: 15,048.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,456.57 : 25,469.28 = 10,905.33 : x
  2. Step 2: Convert to fraction form
    18,456.57/25,469.28 = 10,905.33/x
  3. Step 3: Cross multiply
    18,456.57x = 25,469.28 × 10,905.33
  4. Step 4: Simplify right side
    18,456.57x = 277,750,903.26
  5. Step 5: Solve for x
    x = 277,750,903.26/18,456.57
  6. Step 6: Final answer
    x = 15,048.89

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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.