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Finding the Fourth Proportional to 13,601.51, 20,392.70 and 5,274.51

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Solution

The fourth proportional to 13,601.51, 20,392.70 and 5,274.51 is: 7,908.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,601.51 : 20,392.70 = 5,274.51 : x
  2. Step 2: Convert to fraction form
    13,601.51/20,392.70 = 5,274.51/x
  3. Step 3: Cross multiply
    13,601.51x = 20,392.70 × 5,274.51
  4. Step 4: Simplify right side
    13,601.51x = 107,561,541.61
  5. Step 5: Solve for x
    x = 107,561,541.61/13,601.51
  6. Step 6: Final answer
    x = 7,908.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.