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Finding the Fourth Proportional to 18,729.92, 25,838.52 and 12,012.32

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Solution

The fourth proportional to 18,729.92, 25,838.52 and 12,012.32 is: 16,571.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,729.92 : 25,838.52 = 12,012.32 : x
  2. Step 2: Convert to fraction form
    18,729.92/25,838.52 = 12,012.32/x
  3. Step 3: Cross multiply
    18,729.92x = 25,838.52 × 12,012.32
  4. Step 4: Simplify right side
    18,729.92x = 310,380,570.57
  5. Step 5: Solve for x
    x = 310,380,570.57/18,729.92
  6. Step 6: Final answer
    x = 16,571.38

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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.