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Finding the Fourth Proportional to 13,382.91, 18,477.09 and 8,605

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Solution

The fourth proportional to 13,382.91, 18,477.09 and 8,605 is: 11,880.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,382.91 : 18,477.09 = 8,605 : x
  2. Step 2: Convert to fraction form
    13,382.91/18,477.09 = 8,605/x
  3. Step 3: Cross multiply
    13,382.91x = 18,477.09 × 8,605
  4. Step 4: Simplify right side
    13,382.91x = 158,995,316.43
  5. Step 5: Solve for x
    x = 158,995,316.43/13,382.91
  6. Step 6: Final answer
    x = 11,880.47

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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.