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Finding the Fourth Proportional to 6,603.64, 9,109.92 and 3,913

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Solution

The fourth proportional to 6,603.64, 9,109.92 and 3,913 is: 5,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,603.64 : 9,109.92 = 3,913 : x
  2. Step 2: Convert to fraction form
    6,603.64/9,109.92 = 3,913/x
  3. Step 3: Cross multiply
    6,603.64x = 9,109.92 × 3,913
  4. Step 4: Simplify right side
    6,603.64x = 35,647,116.96
  5. Step 5: Solve for x
    x = 35,647,116.96/6,603.64
  6. Step 6: Final answer
    x = 5,398.10

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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.