Home / 20,679.98-28,539.86-11,728.26

Finding the Fourth Proportional to 20,679.98, 28,539.86 and 11,728.26

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Solution

The fourth proportional to 20,679.98, 28,539.86 and 11,728.26 is: 16,185.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.98 : 28,539.86 = 11,728.26 : x
  2. Step 2: Convert to fraction form
    20,679.98/28,539.86 = 11,728.26/x
  3. Step 3: Cross multiply
    20,679.98x = 28,539.86 × 11,728.26
  4. Step 4: Simplify right side
    20,679.98x = 334,722,898.44
  5. Step 5: Solve for x
    x = 334,722,898.44/20,679.98
  6. Step 6: Final answer
    x = 16,185.84

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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.