Home / 13,679.61-20,515.77-3,817.16

Finding the Fourth Proportional to 13,679.61, 20,515.77 and 3,817.16

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Solution

The fourth proportional to 13,679.61, 20,515.77 and 3,817.16 is: 5,724.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.61 : 20,515.77 = 3,817.16 : x
  2. Step 2: Convert to fraction form
    13,679.61/20,515.77 = 3,817.16/x
  3. Step 3: Cross multiply
    13,679.61x = 20,515.77 × 3,817.16
  4. Step 4: Simplify right side
    13,679.61x = 78,311,976.61
  5. Step 5: Solve for x
    x = 78,311,976.61/13,679.61
  6. Step 6: Final answer
    x = 5,724.72

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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.