Home / 13,611.24-20,279.97-12,717

Finding the Fourth Proportional to 13,611.24, 20,279.97 and 12,717

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Solution

The fourth proportional to 13,611.24, 20,279.97 and 12,717 is: 18,947.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.24 : 20,279.97 = 12,717 : x
  2. Step 2: Convert to fraction form
    13,611.24/20,279.97 = 12,717/x
  3. Step 3: Cross multiply
    13,611.24x = 20,279.97 × 12,717
  4. Step 4: Simplify right side
    13,611.24x = 257,900,378.49
  5. Step 5: Solve for x
    x = 257,900,378.49/13,611.24
  6. Step 6: Final answer
    x = 18,947.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.