Home / 11,769.12-17,669.12-7,890.88

Finding the Fourth Proportional to 11,769.12, 17,669.12 and 7,890.88

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Solution

The fourth proportional to 11,769.12, 17,669.12 and 7,890.88 is: 11,846.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,769.12 : 17,669.12 = 7,890.88 : x
  2. Step 2: Convert to fraction form
    11,769.12/17,669.12 = 7,890.88/x
  3. Step 3: Cross multiply
    11,769.12x = 17,669.12 × 7,890.88
  4. Step 4: Simplify right side
    11,769.12x = 139,424,905.63
  5. Step 5: Solve for x
    x = 139,424,905.63/11,769.12
  6. Step 6: Final answer
    x = 11,846.67

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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.