Home / 19,143.78-28,725.42-8,611.71

Finding the Fourth Proportional to 19,143.78, 28,725.42 and 8,611.71

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Solution

The fourth proportional to 19,143.78, 28,725.42 and 8,611.71 is: 12,921.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,143.78 : 28,725.42 = 8,611.71 : x
  2. Step 2: Convert to fraction form
    19,143.78/28,725.42 = 8,611.71/x
  3. Step 3: Cross multiply
    19,143.78x = 28,725.42 × 8,611.71
  4. Step 4: Simplify right side
    19,143.78x = 247,374,986.67
  5. Step 5: Solve for x
    x = 247,374,986.67/19,143.78
  6. Step 6: Final answer
    x = 12,921.95

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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.