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Finding the Fourth Proportional to 13,859.25, 20,788.88 and 5,542.98

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Solution

The fourth proportional to 13,859.25, 20,788.88 and 5,542.98 is: 8,314.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.25 : 20,788.88 = 5,542.98 : x
  2. Step 2: Convert to fraction form
    13,859.25/20,788.88 = 5,542.98/x
  3. Step 3: Cross multiply
    13,859.25x = 20,788.88 × 5,542.98
  4. Step 4: Simplify right side
    13,859.25x = 115,232,318.35
  5. Step 5: Solve for x
    x = 115,232,318.35/13,859.25
  6. Step 6: Final answer
    x = 8,314.47

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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.