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Finding the Fourth Proportional to 18,436.80, 27,638.72 and 8,040.32

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Solution

The fourth proportional to 18,436.80, 27,638.72 and 8,040.32 is: 12,053.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,436.80 : 27,638.72 = 8,040.32 : x
  2. Step 2: Convert to fraction form
    18,436.80/27,638.72 = 8,040.32/x
  3. Step 3: Cross multiply
    18,436.80x = 27,638.72 × 8,040.32
  4. Step 4: Simplify right side
    18,436.80x = 222,224,153.19
  5. Step 5: Solve for x
    x = 222,224,153.19/18,436.80
  6. Step 6: Final answer
    x = 12,053.29

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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.