Home / 20,319.11-28,029.08-11,820.27

Finding the Fourth Proportional to 20,319.11, 28,029.08 and 11,820.27

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Solution

The fourth proportional to 20,319.11, 28,029.08 and 11,820.27 is: 16,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.11 : 28,029.08 = 11,820.27 : x
  2. Step 2: Convert to fraction form
    20,319.11/28,029.08 = 11,820.27/x
  3. Step 3: Cross multiply
    20,319.11x = 28,029.08 × 11,820.27
  4. Step 4: Simplify right side
    20,319.11x = 331,311,234.35
  5. Step 5: Solve for x
    x = 331,311,234.35/20,319.11
  6. Step 6: Final answer
    x = 16,305.40

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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.