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Finding the Fourth Proportional to 18,188.89, 25,079.20 and 12,449.11

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Solution

The fourth proportional to 18,188.89, 25,079.20 and 12,449.11 is: 17,165.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,188.89 : 25,079.20 = 12,449.11 : x
  2. Step 2: Convert to fraction form
    18,188.89/25,079.20 = 12,449.11/x
  3. Step 3: Cross multiply
    18,188.89x = 25,079.20 × 12,449.11
  4. Step 4: Simplify right side
    18,188.89x = 312,213,782.44
  5. Step 5: Solve for x
    x = 312,213,782.44/18,188.89
  6. Step 6: Final answer
    x = 17,165.08

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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.