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Finding the Fourth Proportional to 13,232.80, 19,863.60 and 7,400.80

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Solution

The fourth proportional to 13,232.80, 19,863.60 and 7,400.80 is: 11,109.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,232.80 : 19,863.60 = 7,400.80 : x
  2. Step 2: Convert to fraction form
    13,232.80/19,863.60 = 7,400.80/x
  3. Step 3: Cross multiply
    13,232.80x = 19,863.60 × 7,400.80
  4. Step 4: Simplify right side
    13,232.80x = 147,006,530.88
  5. Step 5: Solve for x
    x = 147,006,530.88/13,232.80
  6. Step 6: Final answer
    x = 11,109.25

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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.