Home / 20,981.61-31,472.49-7,833.84

Finding the Fourth Proportional to 20,981.61, 31,472.49 and 7,833.84

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Solution

The fourth proportional to 20,981.61, 31,472.49 and 7,833.84 is: 11,750.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.61 : 31,472.49 = 7,833.84 : x
  2. Step 2: Convert to fraction form
    20,981.61/31,472.49 = 7,833.84/x
  3. Step 3: Cross multiply
    20,981.61x = 31,472.49 × 7,833.84
  4. Step 4: Simplify right side
    20,981.61x = 246,550,451.06
  5. Step 5: Solve for x
    x = 246,550,451.06/20,981.61
  6. Step 6: Final answer
    x = 11,750.79

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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.