Home / 21,147.68-29,184.84-11,716.28

Finding the Fourth Proportional to 21,147.68, 29,184.84 and 11,716.28

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Solution

The fourth proportional to 21,147.68, 29,184.84 and 11,716.28 is: 16,169.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.68 : 29,184.84 = 11,716.28 : x
  2. Step 2: Convert to fraction form
    21,147.68/29,184.84 = 11,716.28/x
  3. Step 3: Cross multiply
    21,147.68x = 29,184.84 × 11,716.28
  4. Step 4: Simplify right side
    21,147.68x = 341,937,757.20
  5. Step 5: Solve for x
    x = 341,937,757.20/21,147.68
  6. Step 6: Final answer
    x = 16,169.04

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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.