Home / 20,358.80-28,108.68-15,634.64

Finding the Fourth Proportional to 20,358.80, 28,108.68 and 15,634.64

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Solution

The fourth proportional to 20,358.80, 28,108.68 and 15,634.64 is: 21,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.80 : 28,108.68 = 15,634.64 : x
  2. Step 2: Convert to fraction form
    20,358.80/28,108.68 = 15,634.64/x
  3. Step 3: Cross multiply
    20,358.80x = 28,108.68 × 15,634.64
  4. Step 4: Simplify right side
    20,358.80x = 439,469,092.68
  5. Step 5: Solve for x
    x = 439,469,092.68/20,358.80
  6. Step 6: Final answer
    x = 21,586.20

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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.