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Finding the Fourth Proportional to 13,299, 18,338.99 and 8,762.87

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Solution

The fourth proportional to 13,299, 18,338.99 and 8,762.87 is: 12,083.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,299 : 18,338.99 = 8,762.87 : x
  2. Step 2: Convert to fraction form
    13,299/18,338.99 = 8,762.87/x
  3. Step 3: Cross multiply
    13,299x = 18,338.99 × 8,762.87
  4. Step 4: Simplify right side
    13,299x = 160,702,049.79
  5. Step 5: Solve for x
    x = 160,702,049.79/13,299
  6. Step 6: Final answer
    x = 12,083.77

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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.