Home / 20,820.43-31,223.58-6,776.97

Finding the Fourth Proportional to 20,820.43, 31,223.58 and 6,776.97

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Solution

The fourth proportional to 20,820.43, 31,223.58 and 6,776.97 is: 10,163.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.43 : 31,223.58 = 6,776.97 : x
  2. Step 2: Convert to fraction form
    20,820.43/31,223.58 = 6,776.97/x
  3. Step 3: Cross multiply
    20,820.43x = 31,223.58 × 6,776.97
  4. Step 4: Simplify right side
    20,820.43x = 211,601,264.95
  5. Step 5: Solve for x
    x = 211,601,264.95/20,820.43
  6. Step 6: Final answer
    x = 10,163.16

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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.