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Finding the Fourth Proportional to 11,721.60, 16,284.60 and 11,613.60

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Solution

The fourth proportional to 11,721.60, 16,284.60 and 11,613.60 is: 16,134.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.60 : 16,284.60 = 11,613.60 : x
  2. Step 2: Convert to fraction form
    11,721.60/16,284.60 = 11,613.60/x
  3. Step 3: Cross multiply
    11,721.60x = 16,284.60 × 11,613.60
  4. Step 4: Simplify right side
    11,721.60x = 189,122,830.56
  5. Step 5: Solve for x
    x = 189,122,830.56/11,721.60
  6. Step 6: Final answer
    x = 16,134.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.