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Finding the Fourth Proportional to 13,326.88, 18,391.44 and 7,358.80

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Solution

The fourth proportional to 13,326.88, 18,391.44 and 7,358.80 is: 10,155.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,326.88 : 18,391.44 = 7,358.80 : x
  2. Step 2: Convert to fraction form
    13,326.88/18,391.44 = 7,358.80/x
  3. Step 3: Cross multiply
    13,326.88x = 18,391.44 × 7,358.80
  4. Step 4: Simplify right side
    13,326.88x = 135,338,928.67
  5. Step 5: Solve for x
    x = 135,338,928.67/13,326.88
  6. Step 6: Final answer
    x = 10,155.33

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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.