Home / 15,128.94-20,877.57-8,414.55

Finding the Fourth Proportional to 15,128.94, 20,877.57 and 8,414.55

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Solution

The fourth proportional to 15,128.94, 20,877.57 and 8,414.55 is: 11,611.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.94 : 20,877.57 = 8,414.55 : x
  2. Step 2: Convert to fraction form
    15,128.94/20,877.57 = 8,414.55/x
  3. Step 3: Cross multiply
    15,128.94x = 20,877.57 × 8,414.55
  4. Step 4: Simplify right side
    15,128.94x = 175,675,356.64
  5. Step 5: Solve for x
    x = 175,675,356.64/15,128.94
  6. Step 6: Final answer
    x = 11,611.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.