Home / 20,573.12-28,390.33-12,189.62

Finding the Fourth Proportional to 20,573.12, 28,390.33 and 12,189.62

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Solution

The fourth proportional to 20,573.12, 28,390.33 and 12,189.62 is: 16,821.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.12 : 28,390.33 = 12,189.62 : x
  2. Step 2: Convert to fraction form
    20,573.12/28,390.33 = 12,189.62/x
  3. Step 3: Cross multiply
    20,573.12x = 28,390.33 × 12,189.62
  4. Step 4: Simplify right side
    20,573.12x = 346,067,334.37
  5. Step 5: Solve for x
    x = 346,067,334.37/20,573.12
  6. Step 6: Final answer
    x = 16,821.33

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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.