Home / 20,785.20-31,177.78-5,202.82

Finding the Fourth Proportional to 20,785.20, 31,177.78 and 5,202.82

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Solution

The fourth proportional to 20,785.20, 31,177.78 and 5,202.82 is: 7,804.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.20 : 31,177.78 = 5,202.82 : x
  2. Step 2: Convert to fraction form
    20,785.20/31,177.78 = 5,202.82/x
  3. Step 3: Cross multiply
    20,785.20x = 31,177.78 × 5,202.82
  4. Step 4: Simplify right side
    20,785.20x = 162,212,377.34
  5. Step 5: Solve for x
    x = 162,212,377.34/20,785.20
  6. Step 6: Final answer
    x = 7,804.22

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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.