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Finding the Fourth Proportional to 21,993.60, 33,014.70 and 12,152.10

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Solution

The fourth proportional to 21,993.60, 33,014.70 and 12,152.10 is: 18,241.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,993.60 : 33,014.70 = 12,152.10 : x
  2. Step 2: Convert to fraction form
    21,993.60/33,014.70 = 12,152.10/x
  3. Step 3: Cross multiply
    21,993.60x = 33,014.70 × 12,152.10
  4. Step 4: Simplify right side
    21,993.60x = 401,197,935.87
  5. Step 5: Solve for x
    x = 401,197,935.87/21,993.60
  6. Step 6: Final answer
    x = 18,241.58

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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.