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Finding the Fourth Proportional to 18,641.56, 25,725.44 and 10,143.68

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Solution

The fourth proportional to 18,641.56, 25,725.44 and 10,143.68 is: 13,998.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.56 : 25,725.44 = 10,143.68 : x
  2. Step 2: Convert to fraction form
    18,641.56/25,725.44 = 10,143.68/x
  3. Step 3: Cross multiply
    18,641.56x = 25,725.44 × 10,143.68
  4. Step 4: Simplify right side
    18,641.56x = 260,950,631.22
  5. Step 5: Solve for x
    x = 260,950,631.22/18,641.56
  6. Step 6: Final answer
    x = 13,998.33

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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.