Home / 20,420.44-28,185.06-12,469.34

Finding the Fourth Proportional to 20,420.44, 28,185.06 and 12,469.34

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Solution

The fourth proportional to 20,420.44, 28,185.06 and 12,469.34 is: 17,210.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.44 : 28,185.06 = 12,469.34 : x
  2. Step 2: Convert to fraction form
    20,420.44/28,185.06 = 12,469.34/x
  3. Step 3: Cross multiply
    20,420.44x = 28,185.06 × 12,469.34
  4. Step 4: Simplify right side
    20,420.44x = 351,449,213.28
  5. Step 5: Solve for x
    x = 351,449,213.28/20,420.44
  6. Step 6: Final answer
    x = 17,210.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.