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Finding the Fourth Proportional to 21,682.64, 29,923.80 and 12,253.16

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Solution

The fourth proportional to 21,682.64, 29,923.80 and 12,253.16 is: 16,910.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,682.64 : 29,923.80 = 12,253.16 : x
  2. Step 2: Convert to fraction form
    21,682.64/29,923.80 = 12,253.16/x
  3. Step 3: Cross multiply
    21,682.64x = 29,923.80 × 12,253.16
  4. Step 4: Simplify right side
    21,682.64x = 366,661,109.21
  5. Step 5: Solve for x
    x = 366,661,109.21/21,682.64
  6. Step 6: Final answer
    x = 16,910.35

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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.