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Finding the Fourth Proportional to 12,369.28, 18,554.05 and 9,919.67

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Solution

The fourth proportional to 12,369.28, 18,554.05 and 9,919.67 is: 14,879.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,369.28 : 18,554.05 = 9,919.67 : x
  2. Step 2: Convert to fraction form
    12,369.28/18,554.05 = 9,919.67/x
  3. Step 3: Cross multiply
    12,369.28x = 18,554.05 × 9,919.67
  4. Step 4: Simplify right side
    12,369.28x = 184,049,986.16
  5. Step 5: Solve for x
    x = 184,049,986.16/12,369.28
  6. Step 6: Final answer
    x = 14,879.61

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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.