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Finding the Fourth Proportional to 38,986.80, 58,441.80 and 19,268.40

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Solution

The fourth proportional to 38,986.80, 58,441.80 and 19,268.40 is: 28,883.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,986.80 : 58,441.80 = 19,268.40 : x
  2. Step 2: Convert to fraction form
    38,986.80/58,441.80 = 19,268.40/x
  3. Step 3: Cross multiply
    38,986.80x = 58,441.80 × 19,268.40
  4. Step 4: Simplify right side
    38,986.80x = 1,126,079,979.12
  5. Step 5: Solve for x
    x = 1,126,079,979.12/38,986.80
  6. Step 6: Final answer
    x = 28,883.62

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Why These Related Problems?

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