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Finding the Fourth Proportional to 14,485.92, 19,989.44 and 8,199.28

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Solution

The fourth proportional to 14,485.92, 19,989.44 and 8,199.28 is: 11,314.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,485.92 : 19,989.44 = 8,199.28 : x
  2. Step 2: Convert to fraction form
    14,485.92/19,989.44 = 8,199.28/x
  3. Step 3: Cross multiply
    14,485.92x = 19,989.44 × 8,199.28
  4. Step 4: Simplify right side
    14,485.92x = 163,899,015.60
  5. Step 5: Solve for x
    x = 163,899,015.60/14,485.92
  6. Step 6: Final answer
    x = 11,314.37

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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.