Home / 13,687.44-18,888.84-8,380.32

Finding the Fourth Proportional to 13,687.44, 18,888.84 and 8,380.32

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Solution

The fourth proportional to 13,687.44, 18,888.84 and 8,380.32 is: 11,564.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.44 : 18,888.84 = 8,380.32 : x
  2. Step 2: Convert to fraction form
    13,687.44/18,888.84 = 8,380.32/x
  3. Step 3: Cross multiply
    13,687.44x = 18,888.84 × 8,380.32
  4. Step 4: Simplify right side
    13,687.44x = 158,294,523.63
  5. Step 5: Solve for x
    x = 158,294,523.63/13,687.44
  6. Step 6: Final answer
    x = 11,564.95

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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.