Home / 20,812.72-28,717.82-12,310.61

Finding the Fourth Proportional to 20,812.72, 28,717.82 and 12,310.61

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Solution

The fourth proportional to 20,812.72, 28,717.82 and 12,310.61 is: 16,986.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.72 : 28,717.82 = 12,310.61 : x
  2. Step 2: Convert to fraction form
    20,812.72/28,717.82 = 12,310.61/x
  3. Step 3: Cross multiply
    20,812.72x = 28,717.82 × 12,310.61
  4. Step 4: Simplify right side
    20,812.72x = 353,533,882.07
  5. Step 5: Solve for x
    x = 353,533,882.07/20,812.72
  6. Step 6: Final answer
    x = 16,986.43

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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.