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Finding the Fourth Proportional to 18,921.64, 26,112.06 and 11,852.22

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Solution

The fourth proportional to 18,921.64, 26,112.06 and 11,852.22 is: 16,356.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.64 : 26,112.06 = 11,852.22 : x
  2. Step 2: Convert to fraction form
    18,921.64/26,112.06 = 11,852.22/x
  3. Step 3: Cross multiply
    18,921.64x = 26,112.06 × 11,852.22
  4. Step 4: Simplify right side
    18,921.64x = 309,485,879.77
  5. Step 5: Solve for x
    x = 309,485,879.77/18,921.64
  6. Step 6: Final answer
    x = 16,356.19

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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.