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Finding the Fourth Proportional to 21,693.94, 29,939.16 and 12,262.58

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Solution

The fourth proportional to 21,693.94, 29,939.16 and 12,262.58 is: 16,923.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,693.94 : 29,939.16 = 12,262.58 : x
  2. Step 2: Convert to fraction form
    21,693.94/29,939.16 = 12,262.58/x
  3. Step 3: Cross multiply
    21,693.94x = 29,939.16 × 12,262.58
  4. Step 4: Simplify right side
    21,693.94x = 367,131,344.63
  5. Step 5: Solve for x
    x = 367,131,344.63/21,693.94
  6. Step 6: Final answer
    x = 16,923.22

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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.