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Finding the Fourth Proportional to 11,994.70, 16,555.65 and 8,172.65

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Solution

The fourth proportional to 11,994.70, 16,555.65 and 8,172.65 is: 11,280.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,994.70 : 16,555.65 = 8,172.65 : x
  2. Step 2: Convert to fraction form
    11,994.70/16,555.65 = 8,172.65/x
  3. Step 3: Cross multiply
    11,994.70x = 16,555.65 × 8,172.65
  4. Step 4: Simplify right side
    11,994.70x = 135,303,492.11
  5. Step 5: Solve for x
    x = 135,303,492.11/11,994.70
  6. Step 6: Final answer
    x = 11,280.28

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.