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Finding the Fourth Proportional to 13,696.13, 18,900.62 and 7,408.51

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Solution

The fourth proportional to 13,696.13, 18,900.62 and 7,408.51 is: 10,223.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,696.13 : 18,900.62 = 7,408.51 : x
  2. Step 2: Convert to fraction form
    13,696.13/18,900.62 = 7,408.51/x
  3. Step 3: Cross multiply
    13,696.13x = 18,900.62 × 7,408.51
  4. Step 4: Simplify right side
    13,696.13x = 140,025,337.77
  5. Step 5: Solve for x
    x = 140,025,337.77/13,696.13
  6. Step 6: Final answer
    x = 10,223.72

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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.