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Finding the Fourth Proportional to 22,412.80, 33,619.20 and 18,956.80

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Solution

The fourth proportional to 22,412.80, 33,619.20 and 18,956.80 is: 28,435.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,412.80 : 33,619.20 = 18,956.80 : x
  2. Step 2: Convert to fraction form
    22,412.80/33,619.20 = 18,956.80/x
  3. Step 3: Cross multiply
    22,412.80x = 33,619.20 × 18,956.80
  4. Step 4: Simplify right side
    22,412.80x = 637,312,450.56
  5. Step 5: Solve for x
    x = 637,312,450.56/22,412.80
  6. Step 6: Final answer
    x = 28,435.20

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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.