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Finding the Fourth Proportional to 13,201.71, 18,217.82 and 7,899.45

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Solution

The fourth proportional to 13,201.71, 18,217.82 and 7,899.45 is: 10,900.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,201.71 : 18,217.82 = 7,899.45 : x
  2. Step 2: Convert to fraction form
    13,201.71/18,217.82 = 7,899.45/x
  3. Step 3: Cross multiply
    13,201.71x = 18,217.82 × 7,899.45
  4. Step 4: Simplify right side
    13,201.71x = 143,910,771.98
  5. Step 5: Solve for x
    x = 143,910,771.98/13,201.71
  6. Step 6: Final answer
    x = 10,900.92

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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.