Home / 28,083.89-42,138.99-12,286.88

Finding the Fourth Proportional to 28,083.89, 42,138.99 and 12,286.88

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Solution

The fourth proportional to 28,083.89, 42,138.99 and 12,286.88 is: 18,436.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,083.89 : 42,138.99 = 12,286.88 : x
  2. Step 2: Convert to fraction form
    28,083.89/42,138.99 = 12,286.88/x
  3. Step 3: Cross multiply
    28,083.89x = 42,138.99 × 12,286.88
  4. Step 4: Simplify right side
    28,083.89x = 517,756,713.45
  5. Step 5: Solve for x
    x = 517,756,713.45/28,083.89
  6. Step 6: Final answer
    x = 18,436.08

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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.