Home / 21,642.22-32,515.36-20,447.40

Finding the Fourth Proportional to 21,642.22, 32,515.36 and 20,447.40

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Solution

The fourth proportional to 21,642.22, 32,515.36 and 20,447.40 is: 30,720.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,642.22 : 32,515.36 = 20,447.40 : x
  2. Step 2: Convert to fraction form
    21,642.22/32,515.36 = 20,447.40/x
  3. Step 3: Cross multiply
    21,642.22x = 32,515.36 × 20,447.40
  4. Step 4: Simplify right side
    21,642.22x = 664,854,642.88
  5. Step 5: Solve for x
    x = 664,854,642.88/21,642.22
  6. Step 6: Final answer
    x = 30,720.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.