Home / 5,178.07-7,145.74-2,820.22

Finding the Fourth Proportional to 5,178.07, 7,145.74 and 2,820.22

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Solution

The fourth proportional to 5,178.07, 7,145.74 and 2,820.22 is: 3,891.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.07 : 7,145.74 = 2,820.22 : x
  2. Step 2: Convert to fraction form
    5,178.07/7,145.74 = 2,820.22/x
  3. Step 3: Cross multiply
    5,178.07x = 7,145.74 × 2,820.22
  4. Step 4: Simplify right side
    5,178.07x = 20,152,544.52
  5. Step 5: Solve for x
    x = 20,152,544.52/5,178.07
  6. Step 6: Final answer
    x = 3,891.90

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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.