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Finding the Fourth Proportional to 28,164.80, 42,247.20 and 27,905.60

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Solution

The fourth proportional to 28,164.80, 42,247.20 and 27,905.60 is: 41,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,164.80 : 42,247.20 = 27,905.60 : x
  2. Step 2: Convert to fraction form
    28,164.80/42,247.20 = 27,905.60/x
  3. Step 3: Cross multiply
    28,164.80x = 42,247.20 × 27,905.60
  4. Step 4: Simplify right side
    28,164.80x = 1,178,933,464.32
  5. Step 5: Solve for x
    x = 1,178,933,464.32/28,164.80
  6. Step 6: Final answer
    x = 41,858.40

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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.