Home / 28,135.66-42,218.16-20,408.26

Finding the Fourth Proportional to 28,135.66, 42,218.16 and 20,408.26

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Solution

The fourth proportional to 28,135.66, 42,218.16 and 20,408.26 is: 30,623.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.66 : 42,218.16 = 20,408.26 : x
  2. Step 2: Convert to fraction form
    28,135.66/42,218.16 = 20,408.26/x
  3. Step 3: Cross multiply
    28,135.66x = 42,218.16 × 20,408.26
  4. Step 4: Simplify right side
    28,135.66x = 861,599,186.00
  5. Step 5: Solve for x
    x = 861,599,186.00/28,135.66
  6. Step 6: Final answer
    x = 30,623.03

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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.