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Finding the Fourth Proportional to 30,415.50, 45,623.05 and 8,231.15

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Solution

The fourth proportional to 30,415.50, 45,623.05 and 8,231.15 is: 12,346.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,415.50 : 45,623.05 = 8,231.15 : x
  2. Step 2: Convert to fraction form
    30,415.50/45,623.05 = 8,231.15/x
  3. Step 3: Cross multiply
    30,415.50x = 45,623.05 × 8,231.15
  4. Step 4: Simplify right side
    30,415.50x = 375,530,261.49
  5. Step 5: Solve for x
    x = 375,530,261.49/30,415.50
  6. Step 6: Final answer
    x = 12,346.67

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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.