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Finding the Fourth Proportional to 13,641.15, 20,450.93 and 7,485.15

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Solution

The fourth proportional to 13,641.15, 20,450.93 and 7,485.15 is: 11,221.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,641.15 : 20,450.93 = 7,485.15 : x
  2. Step 2: Convert to fraction form
    13,641.15/20,450.93 = 7,485.15/x
  3. Step 3: Cross multiply
    13,641.15x = 20,450.93 × 7,485.15
  4. Step 4: Simplify right side
    13,641.15x = 153,078,241.26
  5. Step 5: Solve for x
    x = 153,078,241.26/13,641.15
  6. Step 6: Final answer
    x = 11,221.80

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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.