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Finding the Fourth Proportional to 18,411.90, 27,601.65 and 11,019.30

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Solution

The fourth proportional to 18,411.90, 27,601.65 and 11,019.30 is: 16,519.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.90 : 27,601.65 = 11,019.30 : x
  2. Step 2: Convert to fraction form
    18,411.90/27,601.65 = 11,019.30/x
  3. Step 3: Cross multiply
    18,411.90x = 27,601.65 × 11,019.30
  4. Step 4: Simplify right side
    18,411.90x = 304,150,861.85
  5. Step 5: Solve for x
    x = 304,150,861.85/18,411.90
  6. Step 6: Final answer
    x = 16,519.25

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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.