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Finding the Fourth Proportional to 21,910.68, 30,236.76 and 11,974.68

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Solution

The fourth proportional to 21,910.68, 30,236.76 and 11,974.68 is: 16,525.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910.68 : 30,236.76 = 11,974.68 : x
  2. Step 2: Convert to fraction form
    21,910.68/30,236.76 = 11,974.68/x
  3. Step 3: Cross multiply
    21,910.68x = 30,236.76 × 11,974.68
  4. Step 4: Simplify right side
    21,910.68x = 362,075,525.24
  5. Step 5: Solve for x
    x = 362,075,525.24/21,910.68
  6. Step 6: Final answer
    x = 16,525.07

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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.