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Finding the Fourth Proportional to 22,155.20, 33,232.80 and 20,211.20

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Solution

The fourth proportional to 22,155.20, 33,232.80 and 20,211.20 is: 30,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,155.20 : 33,232.80 = 20,211.20 : x
  2. Step 2: Convert to fraction form
    22,155.20/33,232.80 = 20,211.20/x
  3. Step 3: Cross multiply
    22,155.20x = 33,232.80 × 20,211.20
  4. Step 4: Simplify right side
    22,155.20x = 671,674,767.36
  5. Step 5: Solve for x
    x = 671,674,767.36/22,155.20
  6. Step 6: Final answer
    x = 30,316.80

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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.