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Finding the Fourth Proportional to 20,754.64, 28,642.42 and 11,682.82

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Solution

The fourth proportional to 20,754.64, 28,642.42 and 11,682.82 is: 16,122.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.64 : 28,642.42 = 11,682.82 : x
  2. Step 2: Convert to fraction form
    20,754.64/28,642.42 = 11,682.82/x
  3. Step 3: Cross multiply
    20,754.64x = 28,642.42 × 11,682.82
  4. Step 4: Simplify right side
    20,754.64x = 334,624,237.22
  5. Step 5: Solve for x
    x = 334,624,237.22/20,754.64
  6. Step 6: Final answer
    x = 16,122.86

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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.