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Finding the Fourth Proportional to 22,271.40, 33,431.40 and 12,405.60

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Solution

The fourth proportional to 22,271.40, 33,431.40 and 12,405.60 is: 18,621.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,271.40 : 33,431.40 = 12,405.60 : x
  2. Step 2: Convert to fraction form
    22,271.40/33,431.40 = 12,405.60/x
  3. Step 3: Cross multiply
    22,271.40x = 33,431.40 × 12,405.60
  4. Step 4: Simplify right side
    22,271.40x = 414,736,575.84
  5. Step 5: Solve for x
    x = 414,736,575.84/22,271.40
  6. Step 6: Final answer
    x = 18,621.94

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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.