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Finding the Fourth Proportional to 13,618.11, 18,795.04 and 8,315.99

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Solution

The fourth proportional to 13,618.11, 18,795.04 and 8,315.99 is: 11,477.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.11 : 18,795.04 = 8,315.99 : x
  2. Step 2: Convert to fraction form
    13,618.11/18,795.04 = 8,315.99/x
  3. Step 3: Cross multiply
    13,618.11x = 18,795.04 × 8,315.99
  4. Step 4: Simplify right side
    13,618.11x = 156,299,249.92
  5. Step 5: Solve for x
    x = 156,299,249.92/13,618.11
  6. Step 6: Final answer
    x = 11,477.31

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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.