Home / 4,750.05-7,121.23-1,978.80

Finding the Fourth Proportional to 4,750.05, 7,121.23 and 1,978.80

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Solution

The fourth proportional to 4,750.05, 7,121.23 and 1,978.80 is: 2,966.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,750.05 : 7,121.23 = 1,978.80 : x
  2. Step 2: Convert to fraction form
    4,750.05/7,121.23 = 1,978.80/x
  3. Step 3: Cross multiply
    4,750.05x = 7,121.23 × 1,978.80
  4. Step 4: Simplify right side
    4,750.05x = 14,091,449.37
  5. Step 5: Solve for x
    x = 14,091,449.37/4,750.05
  6. Step 6: Final answer
    x = 2,966.59

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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.