Home / 5,119.90-7,679.61-1,422.32

Finding the Fourth Proportional to 5,119.90, 7,679.61 and 1,422.32

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Solution

The fourth proportional to 5,119.90, 7,679.61 and 1,422.32 is: 2,133.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.90 : 7,679.61 = 1,422.32 : x
  2. Step 2: Convert to fraction form
    5,119.90/7,679.61 = 1,422.32/x
  3. Step 3: Cross multiply
    5,119.90x = 7,679.61 × 1,422.32
  4. Step 4: Simplify right side
    5,119.90x = 10,922,824.50
  5. Step 5: Solve for x
    x = 10,922,824.50/5,119.90
  6. Step 6: Final answer
    x = 2,133.41

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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.