Home / 20,896.86-31,345.49-5,314.48

Finding the Fourth Proportional to 20,896.86, 31,345.49 and 5,314.48

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Solution

The fourth proportional to 20,896.86, 31,345.49 and 5,314.48 is: 7,971.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.86 : 31,345.49 = 5,314.48 : x
  2. Step 2: Convert to fraction form
    20,896.86/31,345.49 = 5,314.48/x
  3. Step 3: Cross multiply
    20,896.86x = 31,345.49 × 5,314.48
  4. Step 4: Simplify right side
    20,896.86x = 166,584,979.70
  5. Step 5: Solve for x
    x = 166,584,979.70/20,896.86
  6. Step 6: Final answer
    x = 7,971.77

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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.