Home / 5,159.93-7,120.78-2,921.75

Finding the Fourth Proportional to 5,159.93, 7,120.78 and 2,921.75

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Solution

The fourth proportional to 5,159.93, 7,120.78 and 2,921.75 is: 4,032.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.93 : 7,120.78 = 2,921.75 : x
  2. Step 2: Convert to fraction form
    5,159.93/7,120.78 = 2,921.75/x
  3. Step 3: Cross multiply
    5,159.93x = 7,120.78 × 2,921.75
  4. Step 4: Simplify right side
    5,159.93x = 20,805,112.49
  5. Step 5: Solve for x
    x = 20,805,112.49/5,159.93
  6. Step 6: Final answer
    x = 4,032.06

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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.