Home / 7,120.17-9,825.79-3,976.35

Finding the Fourth Proportional to 7,120.17, 9,825.79 and 3,976.35

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Solution

The fourth proportional to 7,120.17, 9,825.79 and 3,976.35 is: 5,487.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.17 : 9,825.79 = 3,976.35 : x
  2. Step 2: Convert to fraction form
    7,120.17/9,825.79 = 3,976.35/x
  3. Step 3: Cross multiply
    7,120.17x = 9,825.79 × 3,976.35
  4. Step 4: Simplify right side
    7,120.17x = 39,070,780.07
  5. Step 5: Solve for x
    x = 39,070,780.07/7,120.17
  6. Step 6: Final answer
    x = 5,487.34

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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.