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Finding the Fourth Proportional to 11,999.87, 17,973.80 and 8,705.69

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Solution

The fourth proportional to 11,999.87, 17,973.80 and 8,705.69 is: 13,039.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.87 : 17,973.80 = 8,705.69 : x
  2. Step 2: Convert to fraction form
    11,999.87/17,973.80 = 8,705.69/x
  3. Step 3: Cross multiply
    11,999.87x = 17,973.80 × 8,705.69
  4. Step 4: Simplify right side
    11,999.87x = 156,474,330.92
  5. Step 5: Solve for x
    x = 156,474,330.92/11,999.87
  6. Step 6: Final answer
    x = 13,039.67

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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.