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Finding the Fourth Proportional to 7,209.99, 9,949.77 and 4,066.16

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Solution

The fourth proportional to 7,209.99, 9,949.77 and 4,066.16 is: 5,611.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209.99 : 9,949.77 = 4,066.16 : x
  2. Step 2: Convert to fraction form
    7,209.99/9,949.77 = 4,066.16/x
  3. Step 3: Cross multiply
    7,209.99x = 9,949.77 × 4,066.16
  4. Step 4: Simplify right side
    7,209.99x = 40,457,307.03
  5. Step 5: Solve for x
    x = 40,457,307.03/7,209.99
  6. Step 6: Final answer
    x = 5,611.28

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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.