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Finding the Fourth Proportional to 18,212.88, 25,133.88 and 11,040.45

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Solution

The fourth proportional to 18,212.88, 25,133.88 and 11,040.45 is: 15,235.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,212.88 : 25,133.88 = 11,040.45 : x
  2. Step 2: Convert to fraction form
    18,212.88/25,133.88 = 11,040.45/x
  3. Step 3: Cross multiply
    18,212.88x = 25,133.88 × 11,040.45
  4. Step 4: Simplify right side
    18,212.88x = 277,489,345.45
  5. Step 5: Solve for x
    x = 277,489,345.45/18,212.88
  6. Step 6: Final answer
    x = 15,235.89

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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.