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Finding the Fourth Proportional to 19,869.90, 29,804.84 and 5,078.79

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Solution

The fourth proportional to 19,869.90, 29,804.84 and 5,078.79 is: 7,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,869.90 : 29,804.84 = 5,078.79 : x
  2. Step 2: Convert to fraction form
    19,869.90/29,804.84 = 5,078.79/x
  3. Step 3: Cross multiply
    19,869.90x = 29,804.84 × 5,078.79
  4. Step 4: Simplify right side
    19,869.90x = 151,372,523.34
  5. Step 5: Solve for x
    x = 151,372,523.34/19,869.90
  6. Step 6: Final answer
    x = 7,618.18

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.