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Finding the Fourth Proportional to 7,183.12, 9,913.80 and 4,040.40

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Solution

The fourth proportional to 7,183.12, 9,913.80 and 4,040.40 is: 5,576.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,183.12 : 9,913.80 = 4,040.40 : x
  2. Step 2: Convert to fraction form
    7,183.12/9,913.80 = 4,040.40/x
  3. Step 3: Cross multiply
    7,183.12x = 9,913.80 × 4,040.40
  4. Step 4: Simplify right side
    7,183.12x = 40,055,717.52
  5. Step 5: Solve for x
    x = 40,055,717.52/7,183.12
  6. Step 6: Final answer
    x = 5,576.37

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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.