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Finding the Fourth Proportional to 7,224.40, 9,969.78 and 4,080.79

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Solution

The fourth proportional to 7,224.40, 9,969.78 and 4,080.79 is: 5,631.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,224.40 : 9,969.78 = 4,080.79 : x
  2. Step 2: Convert to fraction form
    7,224.40/9,969.78 = 4,080.79/x
  3. Step 3: Cross multiply
    7,224.40x = 9,969.78 × 4,080.79
  4. Step 4: Simplify right side
    7,224.40x = 40,684,578.53
  5. Step 5: Solve for x
    x = 40,684,578.53/7,224.40
  6. Step 6: Final answer
    x = 5,631.55

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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.