Home / 7,138.75-9,851.48-3,995.55

Finding the Fourth Proportional to 7,138.75, 9,851.48 and 3,995.55

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Solution

The fourth proportional to 7,138.75, 9,851.48 and 3,995.55 is: 5,513.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.75 : 9,851.48 = 3,995.55 : x
  2. Step 2: Convert to fraction form
    7,138.75/9,851.48 = 3,995.55/x
  3. Step 3: Cross multiply
    7,138.75x = 9,851.48 × 3,995.55
  4. Step 4: Simplify right side
    7,138.75x = 39,362,080.91
  5. Step 5: Solve for x
    x = 39,362,080.91/7,138.75
  6. Step 6: Final answer
    x = 5,513.86

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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.