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Finding the Fourth Proportional to 12,590.53, 18,888.09 and 5,190.88

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Solution

The fourth proportional to 12,590.53, 18,888.09 and 5,190.88 is: 7,787.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.53 : 18,888.09 = 5,190.88 : x
  2. Step 2: Convert to fraction form
    12,590.53/18,888.09 = 5,190.88/x
  3. Step 3: Cross multiply
    12,590.53x = 18,888.09 × 5,190.88
  4. Step 4: Simplify right side
    12,590.53x = 98,045,808.62
  5. Step 5: Solve for x
    x = 98,045,808.62/12,590.53
  6. Step 6: Final answer
    x = 7,787.27

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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.