Home / 5,415.36-8,120.25-2,491.13

Finding the Fourth Proportional to 5,415.36, 8,120.25 and 2,491.13

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Solution

The fourth proportional to 5,415.36, 8,120.25 and 2,491.13 is: 3,735.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.36 : 8,120.25 = 2,491.13 : x
  2. Step 2: Convert to fraction form
    5,415.36/8,120.25 = 2,491.13/x
  3. Step 3: Cross multiply
    5,415.36x = 8,120.25 × 2,491.13
  4. Step 4: Simplify right side
    5,415.36x = 20,228,557.78
  5. Step 5: Solve for x
    x = 20,228,557.78/5,415.36
  6. Step 6: Final answer
    x = 3,735.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.