Home / 19,997.78-29,986.62-6,666.06

Finding the Fourth Proportional to 19,997.78, 29,986.62 and 6,666.06

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Solution

The fourth proportional to 19,997.78, 29,986.62 and 6,666.06 is: 9,995.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,997.78 : 29,986.62 = 6,666.06 : x
  2. Step 2: Convert to fraction form
    19,997.78/29,986.62 = 6,666.06/x
  3. Step 3: Cross multiply
    19,997.78x = 29,986.62 × 6,666.06
  4. Step 4: Simplify right side
    19,997.78x = 199,892,608.12
  5. Step 5: Solve for x
    x = 199,892,608.12/19,997.78
  6. Step 6: Final answer
    x = 9,995.74

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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.