Home / 6,666.46-9,997.80-1,986.28

Finding the Fourth Proportional to 6,666.46, 9,997.80 and 1,986.28

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Solution

The fourth proportional to 6,666.46, 9,997.80 and 1,986.28 is: 2,978.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.46 : 9,997.80 = 1,986.28 : x
  2. Step 2: Convert to fraction form
    6,666.46/9,997.80 = 1,986.28/x
  3. Step 3: Cross multiply
    6,666.46x = 9,997.80 × 1,986.28
  4. Step 4: Simplify right side
    6,666.46x = 19,858,430.18
  5. Step 5: Solve for x
    x = 19,858,430.18/6,666.46
  6. Step 6: Final answer
    x = 2,978.86

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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.