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Finding the Fourth Proportional to 18,508.38, 25,563.38 and 12,529.64

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Solution

The fourth proportional to 18,508.38, 25,563.38 and 12,529.64 is: 17,305.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,508.38 : 25,563.38 = 12,529.64 : x
  2. Step 2: Convert to fraction form
    18,508.38/25,563.38 = 12,529.64/x
  3. Step 3: Cross multiply
    18,508.38x = 25,563.38 × 12,529.64
  4. Step 4: Simplify right side
    18,508.38x = 320,299,758.12
  5. Step 5: Solve for x
    x = 320,299,758.12/18,508.38
  6. Step 6: Final answer
    x = 17,305.66

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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.