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Finding the Fourth Proportional to 7,605.85, 11,405.86 and 3,656

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Solution

The fourth proportional to 7,605.85, 11,405.86 and 3,656 is: 5,482.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,605.85 : 11,405.86 = 3,656 : x
  2. Step 2: Convert to fraction form
    7,605.85/11,405.86 = 3,656/x
  3. Step 3: Cross multiply
    7,605.85x = 11,405.86 × 3,656
  4. Step 4: Simplify right side
    7,605.85x = 41,699,824.16
  5. Step 5: Solve for x
    x = 41,699,824.16/7,605.85
  6. Step 6: Final answer
    x = 5,482.60

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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.