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Finding the Fourth Proportional to 19,745.81, 29,626.94 and 8,660.45

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Solution

The fourth proportional to 19,745.81, 29,626.94 and 8,660.45 is: 12,994.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,745.81 : 29,626.94 = 8,660.45 : x
  2. Step 2: Convert to fraction form
    19,745.81/29,626.94 = 8,660.45/x
  3. Step 3: Cross multiply
    19,745.81x = 29,626.94 × 8,660.45
  4. Step 4: Simplify right side
    19,745.81x = 256,582,441.09
  5. Step 5: Solve for x
    x = 256,582,441.09/19,745.81
  6. Step 6: Final answer
    x = 12,994.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.