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Finding the Fourth Proportional to 18,384.39, 27,580.91 and 7,999.11

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Solution

The fourth proportional to 18,384.39, 27,580.91 and 7,999.11 is: 12,000.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,384.39 : 27,580.91 = 7,999.11 : x
  2. Step 2: Convert to fraction form
    18,384.39/27,580.91 = 7,999.11/x
  3. Step 3: Cross multiply
    18,384.39x = 27,580.91 × 7,999.11
  4. Step 4: Simplify right side
    18,384.39x = 220,622,692.99
  5. Step 5: Solve for x
    x = 220,622,692.99/18,384.39
  6. Step 6: Final answer
    x = 12,000.54

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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.