Home / 18,718.08-28,052.88-7,611.78

Finding the Fourth Proportional to 18,718.08, 28,052.88 and 7,611.78

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Solution

The fourth proportional to 18,718.08, 28,052.88 and 7,611.78 is: 11,407.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.08 : 28,052.88 = 7,611.78 : x
  2. Step 2: Convert to fraction form
    18,718.08/28,052.88 = 7,611.78/x
  3. Step 3: Cross multiply
    18,718.08x = 28,052.88 × 7,611.78
  4. Step 4: Simplify right side
    18,718.08x = 213,532,350.93
  5. Step 5: Solve for x
    x = 213,532,350.93/18,718.08
  6. Step 6: Final answer
    x = 11,407.81

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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.