Home / 30,138.82-45,212.30-12,604.52

Finding the Fourth Proportional to 30,138.82, 45,212.30 and 12,604.52

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Solution

The fourth proportional to 30,138.82, 45,212.30 and 12,604.52 is: 18,908.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,138.82 : 45,212.30 = 12,604.52 : x
  2. Step 2: Convert to fraction form
    30,138.82/45,212.30 = 12,604.52/x
  3. Step 3: Cross multiply
    30,138.82x = 45,212.30 × 12,604.52
  4. Step 4: Simplify right side
    30,138.82x = 569,879,339.60
  5. Step 5: Solve for x
    x = 569,879,339.60/30,138.82
  6. Step 6: Final answer
    x = 18,908.48

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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.