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Finding the Fourth Proportional to 18,391.69, 25,406.15 and 17,708.93

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Solution

The fourth proportional to 18,391.69, 25,406.15 and 17,708.93 is: 24,462.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.69 : 25,406.15 = 17,708.93 : x
  2. Step 2: Convert to fraction form
    18,391.69/25,406.15 = 17,708.93/x
  3. Step 3: Cross multiply
    18,391.69x = 25,406.15 × 17,708.93
  4. Step 4: Simplify right side
    18,391.69x = 449,915,643.37
  5. Step 5: Solve for x
    x = 449,915,643.37/18,391.69
  6. Step 6: Final answer
    x = 24,462.99

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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.