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Finding the Fourth Proportional to 22,128.66, 30,540.06 and 13,629.06

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Solution

The fourth proportional to 22,128.66, 30,540.06 and 13,629.06 is: 18,809.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,128.66 : 30,540.06 = 13,629.06 : x
  2. Step 2: Convert to fraction form
    22,128.66/30,540.06 = 13,629.06/x
  3. Step 3: Cross multiply
    22,128.66x = 30,540.06 × 13,629.06
  4. Step 4: Simplify right side
    22,128.66x = 416,232,310.14
  5. Step 5: Solve for x
    x = 416,232,310.14/22,128.66
  6. Step 6: Final answer
    x = 18,809.65

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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.