Home / 28,131.66-42,212.16-20,404.26

Finding the Fourth Proportional to 28,131.66, 42,212.16 and 20,404.26

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Solution

The fourth proportional to 28,131.66, 42,212.16 and 20,404.26 is: 30,617.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.66 : 42,212.16 = 20,404.26 : x
  2. Step 2: Convert to fraction form
    28,131.66/42,212.16 = 20,404.26/x
  3. Step 3: Cross multiply
    28,131.66x = 42,212.16 × 20,404.26
  4. Step 4: Simplify right side
    28,131.66x = 861,307,887.80
  5. Step 5: Solve for x
    x = 861,307,887.80/28,131.66
  6. Step 6: Final answer
    x = 30,617.03

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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.