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Finding the Fourth Proportional to 55,331.40, 82,986.30 and 18,395.40

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Solution

The fourth proportional to 55,331.40, 82,986.30 and 18,395.40 is: 27,589.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,331.40 : 82,986.30 = 18,395.40 : x
  2. Step 2: Convert to fraction form
    55,331.40/82,986.30 = 18,395.40/x
  3. Step 3: Cross multiply
    55,331.40x = 82,986.30 × 18,395.40
  4. Step 4: Simplify right side
    55,331.40x = 1,526,566,183.02
  5. Step 5: Solve for x
    x = 1,526,566,183.02/55,331.40
  6. Step 6: Final answer
    x = 27,589.51

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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.