Home / 20,820.81-31,223.07-6,777.43

Finding the Fourth Proportional to 20,820.81, 31,223.07 and 6,777.43

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Solution

The fourth proportional to 20,820.81, 31,223.07 and 6,777.43 is: 10,163.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.81 : 31,223.07 = 6,777.43 : x
  2. Step 2: Convert to fraction form
    20,820.81/31,223.07 = 6,777.43/x
  3. Step 3: Cross multiply
    20,820.81x = 31,223.07 × 6,777.43
  4. Step 4: Simplify right side
    20,820.81x = 211,612,171.31
  5. Step 5: Solve for x
    x = 211,612,171.31/20,820.81
  6. Step 6: Final answer
    x = 10,163.49

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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.