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Finding the Fourth Proportional to 11,328.50, 16,994.19 and 3,120.50

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Solution

The fourth proportional to 11,328.50, 16,994.19 and 3,120.50 is: 4,681.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,328.50 : 16,994.19 = 3,120.50 : x
  2. Step 2: Convert to fraction form
    11,328.50/16,994.19 = 3,120.50/x
  3. Step 3: Cross multiply
    11,328.50x = 16,994.19 × 3,120.50
  4. Step 4: Simplify right side
    11,328.50x = 53,030,369.90
  5. Step 5: Solve for x
    x = 53,030,369.90/11,328.50
  6. Step 6: Final answer
    x = 4,681.15

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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.