Home / 21,291.21-29,169.09-20,493.12

Finding the Fourth Proportional to 21,291.21, 29,169.09 and 20,493.12

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Solution

The fourth proportional to 21,291.21, 29,169.09 and 20,493.12 is: 28,075.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.21 : 29,169.09 = 20,493.12 : x
  2. Step 2: Convert to fraction form
    21,291.21/29,169.09 = 20,493.12/x
  3. Step 3: Cross multiply
    21,291.21x = 29,169.09 × 20,493.12
  4. Step 4: Simplify right side
    21,291.21x = 597,765,785.82
  5. Step 5: Solve for x
    x = 597,765,785.82/21,291.21
  6. Step 6: Final answer
    x = 28,075.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.