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Finding the Fourth Proportional to 21,893.69, 30,213.53 and 12,462.32

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Solution

The fourth proportional to 21,893.69, 30,213.53 and 12,462.32 is: 17,198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.69 : 30,213.53 = 12,462.32 : x
  2. Step 2: Convert to fraction form
    21,893.69/30,213.53 = 12,462.32/x
  3. Step 3: Cross multiply
    21,893.69x = 30,213.53 × 12,462.32
  4. Step 4: Simplify right side
    21,893.69x = 376,530,465.81
  5. Step 5: Solve for x
    x = 376,530,465.81/21,893.69
  6. Step 6: Final answer
    x = 17,198.13

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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.