Home / 20,721.60-31,083.84-5,930.64

Finding the Fourth Proportional to 20,721.60, 31,083.84 and 5,930.64

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Solution

The fourth proportional to 20,721.60, 31,083.84 and 5,930.64 is: 8,896.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.60 : 31,083.84 = 5,930.64 : x
  2. Step 2: Convert to fraction form
    20,721.60/31,083.84 = 5,930.64/x
  3. Step 3: Cross multiply
    20,721.60x = 31,083.84 × 5,930.64
  4. Step 4: Simplify right side
    20,721.60x = 184,347,064.86
  5. Step 5: Solve for x
    x = 184,347,064.86/20,721.60
  6. Step 6: Final answer
    x = 8,896.37

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1.5x scale

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.