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Finding the Fourth Proportional to 21,993.66, 32,991.03 and 18,854.10

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Solution

The fourth proportional to 21,993.66, 32,991.03 and 18,854.10 is: 28,281.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,993.66 : 32,991.03 = 18,854.10 : x
  2. Step 2: Convert to fraction form
    21,993.66/32,991.03 = 18,854.10/x
  3. Step 3: Cross multiply
    21,993.66x = 32,991.03 × 18,854.10
  4. Step 4: Simplify right side
    21,993.66x = 622,016,178.72
  5. Step 5: Solve for x
    x = 622,016,178.72/21,993.66
  6. Step 6: Final answer
    x = 28,281.61

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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.