Home / 7,155.20-9,874.67-3,968.80

Finding the Fourth Proportional to 7,155.20, 9,874.67 and 3,968.80

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Solution

The fourth proportional to 7,155.20, 9,874.67 and 3,968.80 is: 5,477.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.20 : 9,874.67 = 3,968.80 : x
  2. Step 2: Convert to fraction form
    7,155.20/9,874.67 = 3,968.80/x
  3. Step 3: Cross multiply
    7,155.20x = 9,874.67 × 3,968.80
  4. Step 4: Simplify right side
    7,155.20x = 39,190,573.67
  5. Step 5: Solve for x
    x = 39,190,573.67/7,155.20
  6. Step 6: Final answer
    x = 5,477.22

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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.