Home / 21,234.57-31,847.67-20,180.85

Finding the Fourth Proportional to 21,234.57, 31,847.67 and 20,180.85

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Solution

The fourth proportional to 21,234.57, 31,847.67 and 20,180.85 is: 30,267.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.57 : 31,847.67 = 20,180.85 : x
  2. Step 2: Convert to fraction form
    21,234.57/31,847.67 = 20,180.85/x
  3. Step 3: Cross multiply
    21,234.57x = 31,847.67 × 20,180.85
  4. Step 4: Simplify right side
    21,234.57x = 642,713,051.12
  5. Step 5: Solve for x
    x = 642,713,051.12/21,234.57
  6. Step 6: Final answer
    x = 30,267.30

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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.