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Finding the Fourth Proportional to 18,783.88, 25,922.56 and 10,400.38

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Solution

The fourth proportional to 18,783.88, 25,922.56 and 10,400.38 is: 14,352.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.88 : 25,922.56 = 10,400.38 : x
  2. Step 2: Convert to fraction form
    18,783.88/25,922.56 = 10,400.38/x
  3. Step 3: Cross multiply
    18,783.88x = 25,922.56 × 10,400.38
  4. Step 4: Simplify right side
    18,783.88x = 269,604,474.57
  5. Step 5: Solve for x
    x = 269,604,474.57/18,783.88
  6. Step 6: Final answer
    x = 14,352.97

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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.