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Finding the Fourth Proportional to 21,677.28, 29,914.64 and 12,245.68

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Solution

The fourth proportional to 21,677.28, 29,914.64 and 12,245.68 is: 16,899.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,677.28 : 29,914.64 = 12,245.68 : x
  2. Step 2: Convert to fraction form
    21,677.28/29,914.64 = 12,245.68/x
  3. Step 3: Cross multiply
    21,677.28x = 29,914.64 × 12,245.68
  4. Step 4: Simplify right side
    21,677.28x = 366,325,108.76
  5. Step 5: Solve for x
    x = 366,325,108.76/21,677.28
  6. Step 6: Final answer
    x = 16,899.03

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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.