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Finding the Fourth Proportional to 18,919.22, 28,381.94 and 6,437.98

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Solution

The fourth proportional to 18,919.22, 28,381.94 and 6,437.98 is: 9,658.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.22 : 28,381.94 = 6,437.98 : x
  2. Step 2: Convert to fraction form
    18,919.22/28,381.94 = 6,437.98/x
  3. Step 3: Cross multiply
    18,919.22x = 28,381.94 × 6,437.98
  4. Step 4: Simplify right side
    18,919.22x = 182,722,425.72
  5. Step 5: Solve for x
    x = 182,722,425.72/18,919.22
  6. Step 6: Final answer
    x = 9,658.03

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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.