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Finding the Fourth Proportional to 13,640.94, 18,823.19 and 8,341.11

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Solution

The fourth proportional to 13,640.94, 18,823.19 and 8,341.11 is: 11,509.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.94 : 18,823.19 = 8,341.11 : x
  2. Step 2: Convert to fraction form
    13,640.94/18,823.19 = 8,341.11/x
  3. Step 3: Cross multiply
    13,640.94x = 18,823.19 × 8,341.11
  4. Step 4: Simplify right side
    13,640.94x = 157,006,256.64
  5. Step 5: Solve for x
    x = 157,006,256.64/13,640.94
  6. Step 6: Final answer
    x = 11,509.93

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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.