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Finding the Fourth Proportional to 18,641.68, 25,725.66 and 10,143.88

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Solution

The fourth proportional to 18,641.68, 25,725.66 and 10,143.88 is: 13,998.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.68 : 25,725.66 = 10,143.88 : x
  2. Step 2: Convert to fraction form
    18,641.68/25,725.66 = 10,143.88/x
  3. Step 3: Cross multiply
    18,641.68x = 25,725.66 × 10,143.88
  4. Step 4: Simplify right side
    18,641.68x = 260,958,007.96
  5. Step 5: Solve for x
    x = 260,958,007.96/18,641.68
  6. Step 6: Final answer
    x = 13,998.63

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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.