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Finding the Fourth Proportional to 18,486.88, 25,486.72 and 13,451.36

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Solution

The fourth proportional to 18,486.88, 25,486.72 and 13,451.36 is: 18,544.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.88 : 25,486.72 = 13,451.36 : x
  2. Step 2: Convert to fraction form
    18,486.88/25,486.72 = 13,451.36/x
  3. Step 3: Cross multiply
    18,486.88x = 25,486.72 × 13,451.36
  4. Step 4: Simplify right side
    18,486.88x = 342,831,045.94
  5. Step 5: Solve for x
    x = 342,831,045.94/18,486.88
  6. Step 6: Final answer
    x = 18,544.56

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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.