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Finding the Fourth Proportional to 18,659.56, 25,714.42 and 11,933.47

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Solution

The fourth proportional to 18,659.56, 25,714.42 and 11,933.47 is: 16,445.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.56 : 25,714.42 = 11,933.47 : x
  2. Step 2: Convert to fraction form
    18,659.56/25,714.42 = 11,933.47/x
  3. Step 3: Cross multiply
    18,659.56x = 25,714.42 × 11,933.47
  4. Step 4: Simplify right side
    18,659.56x = 306,862,199.97
  5. Step 5: Solve for x
    x = 306,862,199.97/18,659.56
  6. Step 6: Final answer
    x = 16,445.31

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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.