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Finding the Fourth Proportional to 18,486.92, 25,518.90 and 12,549.32

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Solution

The fourth proportional to 18,486.92, 25,518.90 and 12,549.32 is: 17,322.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.92 : 25,518.90 = 12,549.32 : x
  2. Step 2: Convert to fraction form
    18,486.92/25,518.90 = 12,549.32/x
  3. Step 3: Cross multiply
    18,486.92x = 25,518.90 × 12,549.32
  4. Step 4: Simplify right side
    18,486.92x = 320,244,842.15
  5. Step 5: Solve for x
    x = 320,244,842.15/18,486.92
  6. Step 6: Final answer
    x = 17,322.78

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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.