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Finding the Fourth Proportional to 38,964.90, 53,770.48 and 21,968.99

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Solution

The fourth proportional to 38,964.90, 53,770.48 and 21,968.99 is: 30,316.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,964.90 : 53,770.48 = 21,968.99 : x
  2. Step 2: Convert to fraction form
    38,964.90/53,770.48 = 21,968.99/x
  3. Step 3: Cross multiply
    38,964.90x = 53,770.48 × 21,968.99
  4. Step 4: Simplify right side
    38,964.90x = 1,181,283,137.42
  5. Step 5: Solve for x
    x = 1,181,283,137.42/38,964.90
  6. Step 6: Final answer
    x = 30,316.60

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.