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Finding the Fourth Proportional to 21,093.84, 29,107.20 and 13,641.84

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Solution

The fourth proportional to 21,093.84, 29,107.20 and 13,641.84 is: 18,824.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,093.84 : 29,107.20 = 13,641.84 : x
  2. Step 2: Convert to fraction form
    21,093.84/29,107.20 = 13,641.84/x
  3. Step 3: Cross multiply
    21,093.84x = 29,107.20 × 13,641.84
  4. Step 4: Simplify right side
    21,093.84x = 397,075,765.25
  5. Step 5: Solve for x
    x = 397,075,765.25/21,093.84
  6. Step 6: Final answer
    x = 18,824.25

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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.