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Finding the Fourth Proportional to 28,007.57, 38,687.40 and 20,754.42

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Solution

The fourth proportional to 28,007.57, 38,687.40 and 20,754.42 is: 28,668.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.57 : 38,687.40 = 20,754.42 : x
  2. Step 2: Convert to fraction form
    28,007.57/38,687.40 = 20,754.42/x
  3. Step 3: Cross multiply
    28,007.57x = 38,687.40 × 20,754.42
  4. Step 4: Simplify right side
    28,007.57x = 802,934,548.31
  5. Step 5: Solve for x
    x = 802,934,548.31/28,007.57
  6. Step 6: Final answer
    x = 28,668.49

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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.