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Finding the Fourth Proportional to 17,912.40, 26,890.20 and 17,782.80

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Solution

The fourth proportional to 17,912.40, 26,890.20 and 17,782.80 is: 26,695.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,912.40 : 26,890.20 = 17,782.80 : x
  2. Step 2: Convert to fraction form
    17,912.40/26,890.20 = 17,782.80/x
  3. Step 3: Cross multiply
    17,912.40x = 26,890.20 × 17,782.80
  4. Step 4: Simplify right side
    17,912.40x = 478,183,048.56
  5. Step 5: Solve for x
    x = 478,183,048.56/17,912.40
  6. Step 6: Final answer
    x = 26,695.64

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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.