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Finding the Fourth Proportional to 21,390.98, 32,091.93 and 8,239.82

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Solution

The fourth proportional to 21,390.98, 32,091.93 and 8,239.82 is: 12,361.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.98 : 32,091.93 = 8,239.82 : x
  2. Step 2: Convert to fraction form
    21,390.98/32,091.93 = 8,239.82/x
  3. Step 3: Cross multiply
    21,390.98x = 32,091.93 × 8,239.82
  4. Step 4: Simplify right side
    21,390.98x = 264,431,566.19
  5. Step 5: Solve for x
    x = 264,431,566.19/21,390.98
  6. Step 6: Final answer
    x = 12,361.83

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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.