Home / 20,280.21-30,420.19-8,272.32

Finding the Fourth Proportional to 20,280.21, 30,420.19 and 8,272.32

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Solution

The fourth proportional to 20,280.21, 30,420.19 and 8,272.32 is: 12,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.21 : 30,420.19 = 8,272.32 : x
  2. Step 2: Convert to fraction form
    20,280.21/30,420.19 = 8,272.32/x
  3. Step 3: Cross multiply
    20,280.21x = 30,420.19 × 8,272.32
  4. Step 4: Simplify right side
    20,280.21x = 251,645,394.04
  5. Step 5: Solve for x
    x = 251,645,394.04/20,280.21
  6. Step 6: Final answer
    x = 12,408.42

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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.