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Finding the Fourth Proportional to 20,646.80, 28,494.48 and 11,694.68

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Solution

The fourth proportional to 20,646.80, 28,494.48 and 11,694.68 is: 16,139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.80 : 28,494.48 = 11,694.68 : x
  2. Step 2: Convert to fraction form
    20,646.80/28,494.48 = 11,694.68/x
  3. Step 3: Cross multiply
    20,646.80x = 28,494.48 × 11,694.68
  4. Step 4: Simplify right side
    20,646.80x = 333,233,682.89
  5. Step 5: Solve for x
    x = 333,233,682.89/20,646.80
  6. Step 6: Final answer
    x = 16,139.73

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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.