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Finding the Fourth Proportional to 6,647.69, 9,173.88 and 3,663.63

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Solution

The fourth proportional to 6,647.69, 9,173.88 and 3,663.63 is: 5,055.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,647.69 : 9,173.88 = 3,663.63 : x
  2. Step 2: Convert to fraction form
    6,647.69/9,173.88 = 3,663.63/x
  3. Step 3: Cross multiply
    6,647.69x = 9,173.88 × 3,663.63
  4. Step 4: Simplify right side
    6,647.69x = 33,609,701.98
  5. Step 5: Solve for x
    x = 33,609,701.98/6,647.69
  6. Step 6: Final answer
    x = 5,055.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.