Home / 20,786.34-31,182.54-6,741.78

Finding the Fourth Proportional to 20,786.34, 31,182.54 and 6,741.78

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Solution

The fourth proportional to 20,786.34, 31,182.54 and 6,741.78 is: 10,113.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.34 : 31,182.54 = 6,741.78 : x
  2. Step 2: Convert to fraction form
    20,786.34/31,182.54 = 6,741.78/x
  3. Step 3: Cross multiply
    20,786.34x = 31,182.54 × 6,741.78
  4. Step 4: Simplify right side
    20,786.34x = 210,225,824.52
  5. Step 5: Solve for x
    x = 210,225,824.52/20,786.34
  6. Step 6: Final answer
    x = 10,113.65

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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.