Home / 21,287.26-29,163.69-20,489.16

Finding the Fourth Proportional to 21,287.26, 29,163.69 and 20,489.16

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Solution

The fourth proportional to 21,287.26, 29,163.69 and 20,489.16 is: 28,070.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.26 : 29,163.69 = 20,489.16 : x
  2. Step 2: Convert to fraction form
    21,287.26/29,163.69 = 20,489.16/x
  3. Step 3: Cross multiply
    21,287.26x = 29,163.69 × 20,489.16
  4. Step 4: Simplify right side
    21,287.26x = 597,539,408.15
  5. Step 5: Solve for x
    x = 597,539,408.15/21,287.26
  6. Step 6: Final answer
    x = 28,070.28

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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.