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Finding the Fourth Proportional to 13,329.60, 19,974.96 and 7,487.88

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Solution

The fourth proportional to 13,329.60, 19,974.96 and 7,487.88 is: 11,220.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,329.60 : 19,974.96 = 7,487.88 : x
  2. Step 2: Convert to fraction form
    13,329.60/19,974.96 = 7,487.88/x
  3. Step 3: Cross multiply
    13,329.60x = 19,974.96 × 7,487.88
  4. Step 4: Simplify right side
    13,329.60x = 149,570,103.48
  5. Step 5: Solve for x
    x = 149,570,103.48/13,329.60
  6. Step 6: Final answer
    x = 11,220.90

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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.