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Finding the Fourth Proportional to 18,719.42, 25,843.17 and 12,759.84

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Solution

The fourth proportional to 18,719.42, 25,843.17 and 12,759.84 is: 17,615.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.42 : 25,843.17 = 12,759.84 : x
  2. Step 2: Convert to fraction form
    18,719.42/25,843.17 = 12,759.84/x
  3. Step 3: Cross multiply
    18,719.42x = 25,843.17 × 12,759.84
  4. Step 4: Simplify right side
    18,719.42x = 329,754,714.29
  5. Step 5: Solve for x
    x = 329,754,714.29/18,719.42
  6. Step 6: Final answer
    x = 17,615.65

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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.