Home / 11,929.86-17,896.50-4,139.28

Finding the Fourth Proportional to 11,929.86, 17,896.50 and 4,139.28

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Solution

The fourth proportional to 11,929.86, 17,896.50 and 4,139.28 is: 6,209.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,929.86 : 17,896.50 = 4,139.28 : x
  2. Step 2: Convert to fraction form
    11,929.86/17,896.50 = 4,139.28/x
  3. Step 3: Cross multiply
    11,929.86x = 17,896.50 × 4,139.28
  4. Step 4: Simplify right side
    11,929.86x = 74,078,624.52
  5. Step 5: Solve for x
    x = 74,078,624.52/11,929.86
  6. Step 6: Final answer
    x = 6,209.51

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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.