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Finding the Fourth Proportional to 28,244.80, 42,415.80 and 18,427.60

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Solution

The fourth proportional to 28,244.80, 42,415.80 and 18,427.60 is: 27,673.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,244.80 : 42,415.80 = 18,427.60 : x
  2. Step 2: Convert to fraction form
    28,244.80/42,415.80 = 18,427.60/x
  3. Step 3: Cross multiply
    28,244.80x = 42,415.80 × 18,427.60
  4. Step 4: Simplify right side
    28,244.80x = 781,621,396.08
  5. Step 5: Solve for x
    x = 781,621,396.08/28,244.80
  6. Step 6: Final answer
    x = 27,673.11

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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.