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Finding the Fourth Proportional to 18,792.56, 25,931.40 and 10,409.12

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Solution

The fourth proportional to 18,792.56, 25,931.40 and 10,409.12 is: 14,363.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.56 : 25,931.40 = 10,409.12 : x
  2. Step 2: Convert to fraction form
    18,792.56/25,931.40 = 10,409.12/x
  3. Step 3: Cross multiply
    18,792.56x = 25,931.40 × 10,409.12
  4. Step 4: Simplify right side
    18,792.56x = 269,923,054.37
  5. Step 5: Solve for x
    x = 269,923,054.37/18,792.56
  6. Step 6: Final answer
    x = 14,363.29

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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.