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Finding the Fourth Proportional to 38,820, 53,571.60 and 22,053

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Solution

The fourth proportional to 38,820, 53,571.60 and 22,053 is: 30,433.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,820 : 53,571.60 = 22,053 : x
  2. Step 2: Convert to fraction form
    38,820/53,571.60 = 22,053/x
  3. Step 3: Cross multiply
    38,820x = 53,571.60 × 22,053
  4. Step 4: Simplify right side
    38,820x = 1,181,414,494.80
  5. Step 5: Solve for x
    x = 1,181,414,494.80/38,820
  6. Step 6: Final answer
    x = 30,433.14

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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.