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Finding the Fourth Proportional to 18,412.90, 27,603.15 and 11,020.30

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Solution

The fourth proportional to 18,412.90, 27,603.15 and 11,020.30 is: 16,520.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,412.90 : 27,603.15 = 11,020.30 : x
  2. Step 2: Convert to fraction form
    18,412.90/27,603.15 = 11,020.30/x
  3. Step 3: Cross multiply
    18,412.90x = 27,603.15 × 11,020.30
  4. Step 4: Simplify right side
    18,412.90x = 304,194,993.95
  5. Step 5: Solve for x
    x = 304,194,993.95/18,412.90
  6. Step 6: Final answer
    x = 16,520.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.