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Finding the Fourth Proportional to 18,782.98, 25,920.90 and 11,613.94

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Solution

The fourth proportional to 18,782.98, 25,920.90 and 11,613.94 is: 16,027.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.98 : 25,920.90 = 11,613.94 : x
  2. Step 2: Convert to fraction form
    18,782.98/25,920.90 = 11,613.94/x
  3. Step 3: Cross multiply
    18,782.98x = 25,920.90 × 11,613.94
  4. Step 4: Simplify right side
    18,782.98x = 301,043,777.35
  5. Step 5: Solve for x
    x = 301,043,777.35/18,782.98
  6. Step 6: Final answer
    x = 16,027.48

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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.