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Finding the Fourth Proportional to 21,997.56, 30,348.68 and 14,447.99

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Solution

The fourth proportional to 21,997.56, 30,348.68 and 14,447.99 is: 19,932.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.56 : 30,348.68 = 14,447.99 : x
  2. Step 2: Convert to fraction form
    21,997.56/30,348.68 = 14,447.99/x
  3. Step 3: Cross multiply
    21,997.56x = 30,348.68 × 14,447.99
  4. Step 4: Simplify right side
    21,997.56x = 438,477,201.17
  5. Step 5: Solve for x
    x = 438,477,201.17/21,997.56
  6. Step 6: Final answer
    x = 19,932.99

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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.