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Finding the Fourth Proportional to 21,953.94, 30,297.62 and 12,393.42

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Solution

The fourth proportional to 21,953.94, 30,297.62 and 12,393.42 is: 17,103.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,953.94 : 30,297.62 = 12,393.42 : x
  2. Step 2: Convert to fraction form
    21,953.94/30,297.62 = 12,393.42/x
  3. Step 3: Cross multiply
    21,953.94x = 30,297.62 × 12,393.42
  4. Step 4: Simplify right side
    21,953.94x = 375,491,129.66
  5. Step 5: Solve for x
    x = 375,491,129.66/21,953.94
  6. Step 6: Final answer
    x = 17,103.59

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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.