Home / 20,979.99-31,475.40-7,832.46

Finding the Fourth Proportional to 20,979.99, 31,475.40 and 7,832.46

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Solution

The fourth proportional to 20,979.99, 31,475.40 and 7,832.46 is: 11,750.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.99 : 31,475.40 = 7,832.46 : x
  2. Step 2: Convert to fraction form
    20,979.99/31,475.40 = 7,832.46/x
  3. Step 3: Cross multiply
    20,979.99x = 31,475.40 × 7,832.46
  4. Step 4: Simplify right side
    20,979.99x = 246,529,811.48
  5. Step 5: Solve for x
    x = 246,529,811.48/20,979.99
  6. Step 6: Final answer
    x = 11,750.71

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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.