Home / 7,155.09-10,731.42-1,959.75

Finding the Fourth Proportional to 7,155.09, 10,731.42 and 1,959.75

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Solution

The fourth proportional to 7,155.09, 10,731.42 and 1,959.75 is: 2,939.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.09 : 10,731.42 = 1,959.75 : x
  2. Step 2: Convert to fraction form
    7,155.09/10,731.42 = 1,959.75/x
  3. Step 3: Cross multiply
    7,155.09x = 10,731.42 × 1,959.75
  4. Step 4: Simplify right side
    7,155.09x = 21,030,900.35
  5. Step 5: Solve for x
    x = 21,030,900.35/7,155.09
  6. Step 6: Final answer
    x = 2,939.29

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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.