Home / 11,921.52-17,882.40-4,128.50

Finding the Fourth Proportional to 11,921.52, 17,882.40 and 4,128.50

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Solution

The fourth proportional to 11,921.52, 17,882.40 and 4,128.50 is: 6,192.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.52 : 17,882.40 = 4,128.50 : x
  2. Step 2: Convert to fraction form
    11,921.52/17,882.40 = 4,128.50/x
  3. Step 3: Cross multiply
    11,921.52x = 17,882.40 × 4,128.50
  4. Step 4: Simplify right side
    11,921.52x = 73,827,488.40
  5. Step 5: Solve for x
    x = 73,827,488.40/11,921.52
  6. Step 6: Final answer
    x = 6,192.79

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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.