Home / 20,983.86-31,457.97-7,833.78

Finding the Fourth Proportional to 20,983.86, 31,457.97 and 7,833.78

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Solution

The fourth proportional to 20,983.86, 31,457.97 and 7,833.78 is: 11,744.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.86 : 31,457.97 = 7,833.78 : x
  2. Step 2: Convert to fraction form
    20,983.86/31,457.97 = 7,833.78/x
  3. Step 3: Cross multiply
    20,983.86x = 31,457.97 × 7,833.78
  4. Step 4: Simplify right side
    20,983.86x = 246,434,816.23
  5. Step 5: Solve for x
    x = 246,434,816.23/20,983.86
  6. Step 6: Final answer
    x = 11,744.02

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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.