Home / 19,997.51-29,986.19-6,665.78

Finding the Fourth Proportional to 19,997.51, 29,986.19 and 6,665.78

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Solution

The fourth proportional to 19,997.51, 29,986.19 and 6,665.78 is: 9,995.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,997.51 : 29,986.19 = 6,665.78 : x
  2. Step 2: Convert to fraction form
    19,997.51/29,986.19 = 6,665.78/x
  3. Step 3: Cross multiply
    19,997.51x = 29,986.19 × 6,665.78
  4. Step 4: Simplify right side
    19,997.51x = 199,881,437.21
  5. Step 5: Solve for x
    x = 199,881,437.21/19,997.51
  6. Step 6: Final answer
    x = 9,995.32

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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.