Home / 20,331.36-30,447.36-12,529.44

Finding the Fourth Proportional to 20,331.36, 30,447.36 and 12,529.44

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Solution

The fourth proportional to 20,331.36, 30,447.36 and 12,529.44 is: 18,763.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.36 : 30,447.36 = 12,529.44 : x
  2. Step 2: Convert to fraction form
    20,331.36/30,447.36 = 12,529.44/x
  3. Step 3: Cross multiply
    20,331.36x = 30,447.36 × 12,529.44
  4. Step 4: Simplify right side
    20,331.36x = 381,488,370.28
  5. Step 5: Solve for x
    x = 381,488,370.28/20,331.36
  6. Step 6: Final answer
    x = 18,763.54

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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.