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Finding the Fourth Proportional to 18,455, 25,467.90 and 11,003

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Solution

The fourth proportional to 18,455, 25,467.90 and 11,003 is: 15,184.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,455 : 25,467.90 = 11,003 : x
  2. Step 2: Convert to fraction form
    18,455/25,467.90 = 11,003/x
  3. Step 3: Cross multiply
    18,455x = 25,467.90 × 11,003
  4. Step 4: Simplify right side
    18,455x = 280,223,303.70
  5. Step 5: Solve for x
    x = 280,223,303.70/18,455
  6. Step 6: Final answer
    x = 15,184.14

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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.