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Finding the Fourth Proportional to 13,893.98, 20,840.99 and 5,125.32

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Solution

The fourth proportional to 13,893.98, 20,840.99 and 5,125.32 is: 7,687.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,893.98 : 20,840.99 = 5,125.32 : x
  2. Step 2: Convert to fraction form
    13,893.98/20,840.99 = 5,125.32/x
  3. Step 3: Cross multiply
    13,893.98x = 20,840.99 × 5,125.32
  4. Step 4: Simplify right side
    13,893.98x = 106,816,717.24
  5. Step 5: Solve for x
    x = 106,816,717.24/13,893.98
  6. Step 6: Final answer
    x = 7,687.99

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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.