Home / 13,611.53-20,415.46-5,290.75

Finding the Fourth Proportional to 13,611.53, 20,415.46 and 5,290.75

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Solution

The fourth proportional to 13,611.53, 20,415.46 and 5,290.75 is: 7,935.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.53 : 20,415.46 = 5,290.75 : x
  2. Step 2: Convert to fraction form
    13,611.53/20,415.46 = 5,290.75/x
  3. Step 3: Cross multiply
    13,611.53x = 20,415.46 × 5,290.75
  4. Step 4: Simplify right side
    13,611.53x = 108,013,095.00
  5. Step 5: Solve for x
    x = 108,013,095.00/13,611.53
  6. Step 6: Final answer
    x = 7,935.41

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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.