Home / 19,991.19-29,986.38-6,665.16

Finding the Fourth Proportional to 19,991.19, 29,986.38 and 6,665.16

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Solution

The fourth proportional to 19,991.19, 29,986.38 and 6,665.16 is: 9,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.19 : 29,986.38 = 6,665.16 : x
  2. Step 2: Convert to fraction form
    19,991.19/29,986.38 = 6,665.16/x
  3. Step 3: Cross multiply
    19,991.19x = 29,986.38 × 6,665.16
  4. Step 4: Simplify right side
    19,991.19x = 199,864,020.52
  5. Step 5: Solve for x
    x = 199,864,020.52/19,991.19
  6. Step 6: Final answer
    x = 9,997.60

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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.