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Finding the Fourth Proportional to 18,418.10, 25,410.31 and 12,048.32

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Solution

The fourth proportional to 18,418.10, 25,410.31 and 12,048.32 is: 16,622.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,418.10 : 25,410.31 = 12,048.32 : x
  2. Step 2: Convert to fraction form
    18,418.10/25,410.31 = 12,048.32/x
  3. Step 3: Cross multiply
    18,418.10x = 25,410.31 × 12,048.32
  4. Step 4: Simplify right side
    18,418.10x = 306,151,546.18
  5. Step 5: Solve for x
    x = 306,151,546.18/18,418.10
  6. Step 6: Final answer
    x = 16,622.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.