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Finding the Fourth Proportional to 13,617.93, 18,794.78 and 8,315.82

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Solution

The fourth proportional to 13,617.93, 18,794.78 and 8,315.82 is: 11,477.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.93 : 18,794.78 = 8,315.82 : x
  2. Step 2: Convert to fraction form
    13,617.93/18,794.78 = 8,315.82/x
  3. Step 3: Cross multiply
    13,617.93x = 18,794.78 × 8,315.82
  4. Step 4: Simplify right side
    13,617.93x = 156,293,965.84
  5. Step 5: Solve for x
    x = 156,293,965.84/13,617.93
  6. Step 6: Final answer
    x = 11,477.07

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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.