Home / 20,783.19-31,174.79-5,200.82

Finding the Fourth Proportional to 20,783.19, 31,174.79 and 5,200.82

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Solution

The fourth proportional to 20,783.19, 31,174.79 and 5,200.82 is: 7,801.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.19 : 31,174.79 = 5,200.82 : x
  2. Step 2: Convert to fraction form
    20,783.19/31,174.79 = 5,200.82/x
  3. Step 3: Cross multiply
    20,783.19x = 31,174.79 × 5,200.82
  4. Step 4: Simplify right side
    20,783.19x = 162,134,289.45
  5. Step 5: Solve for x
    x = 162,134,289.45/20,783.19
  6. Step 6: Final answer
    x = 7,801.22

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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.