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Finding the Fourth Proportional to 13,644.47, 18,822.48 and 7,975.51

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Solution

The fourth proportional to 13,644.47, 18,822.48 and 7,975.51 is: 11,002.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,644.47 : 18,822.48 = 7,975.51 : x
  2. Step 2: Convert to fraction form
    13,644.47/18,822.48 = 7,975.51/x
  3. Step 3: Cross multiply
    13,644.47x = 18,822.48 × 7,975.51
  4. Step 4: Simplify right side
    13,644.47x = 150,118,906.38
  5. Step 5: Solve for x
    x = 150,118,906.38/13,644.47
  6. Step 6: Final answer
    x = 11,002.18

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Double scale
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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.