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Finding the Fourth Proportional to 7,620.89, 10,511.18 and 5,380.43

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Solution

The fourth proportional to 7,620.89, 10,511.18 and 5,380.43 is: 7,421.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.89 : 10,511.18 = 5,380.43 : x
  2. Step 2: Convert to fraction form
    7,620.89/10,511.18 = 5,380.43/x
  3. Step 3: Cross multiply
    7,620.89x = 10,511.18 × 5,380.43
  4. Step 4: Simplify right side
    7,620.89x = 56,554,641.31
  5. Step 5: Solve for x
    x = 56,554,641.31/7,620.89
  6. Step 6: Final answer
    x = 7,421.00

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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.