Home / 20,879.56-31,318.52-6,840.64

Finding the Fourth Proportional to 20,879.56, 31,318.52 and 6,840.64

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Solution

The fourth proportional to 20,879.56, 31,318.52 and 6,840.64 is: 10,260.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.56 : 31,318.52 = 6,840.64 : x
  2. Step 2: Convert to fraction form
    20,879.56/31,318.52 = 6,840.64/x
  3. Step 3: Cross multiply
    20,879.56x = 31,318.52 × 6,840.64
  4. Step 4: Simplify right side
    20,879.56x = 214,238,659.46
  5. Step 5: Solve for x
    x = 214,238,659.46/20,879.56
  6. Step 6: Final answer
    x = 10,260.69

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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.