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Finding the Fourth Proportional to 21,662.64, 29,892.78 and 12,102.48

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Solution

The fourth proportional to 21,662.64, 29,892.78 and 12,102.48 is: 16,700.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,662.64 : 29,892.78 = 12,102.48 : x
  2. Step 2: Convert to fraction form
    21,662.64/29,892.78 = 12,102.48/x
  3. Step 3: Cross multiply
    21,662.64x = 29,892.78 × 12,102.48
  4. Step 4: Simplify right side
    21,662.64x = 361,776,772.09
  5. Step 5: Solve for x
    x = 361,776,772.09/21,662.64
  6. Step 6: Final answer
    x = 16,700.49

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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.