Home / 15,310.89-21,146.86-12,255.38

Finding the Fourth Proportional to 15,310.89, 21,146.86 and 12,255.38

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Solution

The fourth proportional to 15,310.89, 21,146.86 and 12,255.38 is: 16,926.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,310.89 : 21,146.86 = 12,255.38 : x
  2. Step 2: Convert to fraction form
    15,310.89/21,146.86 = 12,255.38/x
  3. Step 3: Cross multiply
    15,310.89x = 21,146.86 × 12,255.38
  4. Step 4: Simplify right side
    15,310.89x = 259,162,793.99
  5. Step 5: Solve for x
    x = 259,162,793.99/15,310.89
  6. Step 6: Final answer
    x = 16,926.70

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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.