Home / 11,909.36-17,865.09-4,889.90

Finding the Fourth Proportional to 11,909.36, 17,865.09 and 4,889.90

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Solution

The fourth proportional to 11,909.36, 17,865.09 and 4,889.90 is: 7,335.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,909.36 : 17,865.09 = 4,889.90 : x
  2. Step 2: Convert to fraction form
    11,909.36/17,865.09 = 4,889.90/x
  3. Step 3: Cross multiply
    11,909.36x = 17,865.09 × 4,889.90
  4. Step 4: Simplify right side
    11,909.36x = 87,358,548.25
  5. Step 5: Solve for x
    x = 87,358,548.25/11,909.36
  6. Step 6: Final answer
    x = 7,335.28

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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.