Home / 20,408.22-28,140.15-18,418.14

Finding the Fourth Proportional to 20,408.22, 28,140.15 and 18,418.14

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Solution

The fourth proportional to 20,408.22, 28,140.15 and 18,418.14 is: 25,396.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.22 : 28,140.15 = 18,418.14 : x
  2. Step 2: Convert to fraction form
    20,408.22/28,140.15 = 18,418.14/x
  3. Step 3: Cross multiply
    20,408.22x = 28,140.15 × 18,418.14
  4. Step 4: Simplify right side
    20,408.22x = 518,289,222.32
  5. Step 5: Solve for x
    x = 518,289,222.32/20,408.22
  6. Step 6: Final answer
    x = 25,396.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.