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Finding the Fourth Proportional to 38,958, 53,762.06 and 21,052.96

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Solution

The fourth proportional to 38,958, 53,762.06 and 21,052.96 is: 29,053.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,958 : 53,762.06 = 21,052.96 : x
  2. Step 2: Convert to fraction form
    38,958/53,762.06 = 21,052.96/x
  3. Step 3: Cross multiply
    38,958x = 53,762.06 × 21,052.96
  4. Step 4: Simplify right side
    38,958x = 1,131,850,498.70
  5. Step 5: Solve for x
    x = 1,131,850,498.70/38,958
  6. Step 6: Final answer
    x = 29,053.10

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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.