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Finding the Fourth Proportional to 18,765.64, 25,898.36 and 11,212

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Solution

The fourth proportional to 18,765.64, 25,898.36 and 11,212 is: 15,473.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.64 : 25,898.36 = 11,212 : x
  2. Step 2: Convert to fraction form
    18,765.64/25,898.36 = 11,212/x
  3. Step 3: Cross multiply
    18,765.64x = 25,898.36 × 11,212
  4. Step 4: Simplify right side
    18,765.64x = 290,372,412.32
  5. Step 5: Solve for x
    x = 290,372,412.32/18,765.64
  6. Step 6: Final answer
    x = 15,473.62

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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.