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Finding the Fourth Proportional to 18,625.81, 25,703.22 and 10,128.10

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Solution

The fourth proportional to 18,625.81, 25,703.22 and 10,128.10 is: 13,976.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,625.81 : 25,703.22 = 10,128.10 : x
  2. Step 2: Convert to fraction form
    18,625.81/25,703.22 = 10,128.10/x
  3. Step 3: Cross multiply
    18,625.81x = 25,703.22 × 10,128.10
  4. Step 4: Simplify right side
    18,625.81x = 260,324,653.97
  5. Step 5: Solve for x
    x = 260,324,653.97/18,625.81
  6. Step 6: Final answer
    x = 13,976.56

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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.