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Finding the Fourth Proportional to 21,660.88, 29,892.02 and 12,230.05

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Solution

The fourth proportional to 21,660.88, 29,892.02 and 12,230.05 is: 16,877.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.88 : 29,892.02 = 12,230.05 : x
  2. Step 2: Convert to fraction form
    21,660.88/29,892.02 = 12,230.05/x
  3. Step 3: Cross multiply
    21,660.88x = 29,892.02 × 12,230.05
  4. Step 4: Simplify right side
    21,660.88x = 365,580,899.20
  5. Step 5: Solve for x
    x = 365,580,899.20/21,660.88
  6. Step 6: Final answer
    x = 16,877.47

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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.