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Finding the Fourth Proportional to 20,799.50, 28,703.50 and 11,846.88

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Solution

The fourth proportional to 20,799.50, 28,703.50 and 11,846.88 is: 16,348.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.50 : 28,703.50 = 11,846.88 : x
  2. Step 2: Convert to fraction form
    20,799.50/28,703.50 = 11,846.88/x
  3. Step 3: Cross multiply
    20,799.50x = 28,703.50 × 11,846.88
  4. Step 4: Simplify right side
    20,799.50x = 340,046,890.46
  5. Step 5: Solve for x
    x = 340,046,890.46/20,799.50
  6. Step 6: Final answer
    x = 16,348.81

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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.