Home / 20,143.22-30,168.81-9,620.64

Finding the Fourth Proportional to 20,143.22, 30,168.81 and 9,620.64

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Solution

The fourth proportional to 20,143.22, 30,168.81 and 9,620.64 is: 14,408.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.22 : 30,168.81 = 9,620.64 : x
  2. Step 2: Convert to fraction form
    20,143.22/30,168.81 = 9,620.64/x
  3. Step 3: Cross multiply
    20,143.22x = 30,168.81 × 9,620.64
  4. Step 4: Simplify right side
    20,143.22x = 290,243,354.50
  5. Step 5: Solve for x
    x = 290,243,354.50/20,143.22
  6. Step 6: Final answer
    x = 14,408.99

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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.