Home / 20,107.10-30,103.05-12,331.10

Finding the Fourth Proportional to 20,107.10, 30,103.05 and 12,331.10

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Solution

The fourth proportional to 20,107.10, 30,103.05 and 12,331.10 is: 18,461.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.10 : 30,103.05 = 12,331.10 : x
  2. Step 2: Convert to fraction form
    20,107.10/30,103.05 = 12,331.10/x
  3. Step 3: Cross multiply
    20,107.10x = 30,103.05 × 12,331.10
  4. Step 4: Simplify right side
    20,107.10x = 371,203,719.86
  5. Step 5: Solve for x
    x = 371,203,719.86/20,107.10
  6. Step 6: Final answer
    x = 18,461.33

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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.