Home / 5,220.36-7,830.42-1,271.63

Finding the Fourth Proportional to 5,220.36, 7,830.42 and 1,271.63

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Solution

The fourth proportional to 5,220.36, 7,830.42 and 1,271.63 is: 1,907.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.36 : 7,830.42 = 1,271.63 : x
  2. Step 2: Convert to fraction form
    5,220.36/7,830.42 = 1,271.63/x
  3. Step 3: Cross multiply
    5,220.36x = 7,830.42 × 1,271.63
  4. Step 4: Simplify right side
    5,220.36x = 9,957,416.56
  5. Step 5: Solve for x
    x = 9,957,416.56/5,220.36
  6. Step 6: Final answer
    x = 1,907.42

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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.