Home / 28,179.85-42,258.84-12,384.25

Finding the Fourth Proportional to 28,179.85, 42,258.84 and 12,384.25

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Solution

The fourth proportional to 28,179.85, 42,258.84 and 12,384.25 is: 18,571.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,179.85 : 42,258.84 = 12,384.25 : x
  2. Step 2: Convert to fraction form
    28,179.85/42,258.84 = 12,384.25/x
  3. Step 3: Cross multiply
    28,179.85x = 42,258.84 × 12,384.25
  4. Step 4: Simplify right side
    28,179.85x = 523,344,039.27
  5. Step 5: Solve for x
    x = 523,344,039.27/28,179.85
  6. Step 6: Final answer
    x = 18,571.57

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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.