Home / 7,173.72-9,899.28-4,190.40

Finding the Fourth Proportional to 7,173.72, 9,899.28 and 4,190.40

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Solution

The fourth proportional to 7,173.72, 9,899.28 and 4,190.40 is: 5,782.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,173.72 : 9,899.28 = 4,190.40 : x
  2. Step 2: Convert to fraction form
    7,173.72/9,899.28 = 4,190.40/x
  3. Step 3: Cross multiply
    7,173.72x = 9,899.28 × 4,190.40
  4. Step 4: Simplify right side
    7,173.72x = 41,481,942.91
  5. Step 5: Solve for x
    x = 41,481,942.91/7,173.72
  6. Step 6: Final answer
    x = 5,782.49

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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.