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Finding the Fourth Proportional to 12,576.99, 18,868.55 and 8,886.43

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Solution

The fourth proportional to 12,576.99, 18,868.55 and 8,886.43 is: 13,331.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,576.99 : 18,868.55 = 8,886.43 : x
  2. Step 2: Convert to fraction form
    12,576.99/18,868.55 = 8,886.43/x
  3. Step 3: Cross multiply
    12,576.99x = 18,868.55 × 8,886.43
  4. Step 4: Simplify right side
    12,576.99x = 167,674,048.78
  5. Step 5: Solve for x
    x = 167,674,048.78/12,576.99
  6. Step 6: Final answer
    x = 13,331.81

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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.