Home / 7,181.40-10,770.89-1,986.06

Finding the Fourth Proportional to 7,181.40, 10,770.89 and 1,986.06

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Solution

The fourth proportional to 7,181.40, 10,770.89 and 1,986.06 is: 2,978.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.40 : 10,770.89 = 1,986.06 : x
  2. Step 2: Convert to fraction form
    7,181.40/10,770.89 = 1,986.06/x
  3. Step 3: Cross multiply
    7,181.40x = 10,770.89 × 1,986.06
  4. Step 4: Simplify right side
    7,181.40x = 21,391,633.79
  5. Step 5: Solve for x
    x = 21,391,633.79/7,181.40
  6. Step 6: Final answer
    x = 2,978.76

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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.