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Finding the Fourth Proportional to 28,506.98, 42,767.42 and 20,089.89

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Solution

The fourth proportional to 28,506.98, 42,767.42 and 20,089.89 is: 30,139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,506.98 : 42,767.42 = 20,089.89 : x
  2. Step 2: Convert to fraction form
    28,506.98/42,767.42 = 20,089.89/x
  3. Step 3: Cross multiply
    28,506.98x = 42,767.42 × 20,089.89
  4. Step 4: Simplify right side
    28,506.98x = 859,192,539.01
  5. Step 5: Solve for x
    x = 859,192,539.01/28,506.98
  6. Step 6: Final answer
    x = 30,139.73

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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.