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Finding the Fourth Proportional to 18,425.70, 27,638.55 and 7,331.67

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Solution

The fourth proportional to 18,425.70, 27,638.55 and 7,331.67 is: 10,997.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.70 : 27,638.55 = 7,331.67 : x
  2. Step 2: Convert to fraction form
    18,425.70/27,638.55 = 7,331.67/x
  3. Step 3: Cross multiply
    18,425.70x = 27,638.55 × 7,331.67
  4. Step 4: Simplify right side
    18,425.70x = 202,636,727.88
  5. Step 5: Solve for x
    x = 202,636,727.88/18,425.70
  6. Step 6: Final answer
    x = 10,997.51

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Similar ratio
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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.