Home / 20,803.94-28,708.89-12,306.50

Finding the Fourth Proportional to 20,803.94, 28,708.89 and 12,306.50

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Solution

The fourth proportional to 20,803.94, 28,708.89 and 12,306.50 is: 16,982.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.94 : 28,708.89 = 12,306.50 : x
  2. Step 2: Convert to fraction form
    20,803.94/28,708.89 = 12,306.50/x
  3. Step 3: Cross multiply
    20,803.94x = 28,708.89 × 12,306.50
  4. Step 4: Simplify right side
    20,803.94x = 353,305,913.78
  5. Step 5: Solve for x
    x = 353,305,913.78/20,803.94
  6. Step 6: Final answer
    x = 16,982.65

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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.