Home / 20,447.21-28,215.20-11,951.32

Finding the Fourth Proportional to 20,447.21, 28,215.20 and 11,951.32

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Solution

The fourth proportional to 20,447.21, 28,215.20 and 11,951.32 is: 16,491.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.21 : 28,215.20 = 11,951.32 : x
  2. Step 2: Convert to fraction form
    20,447.21/28,215.20 = 11,951.32/x
  3. Step 3: Cross multiply
    20,447.21x = 28,215.20 × 11,951.32
  4. Step 4: Simplify right side
    20,447.21x = 337,208,884.06
  5. Step 5: Solve for x
    x = 337,208,884.06/20,447.21
  6. Step 6: Final answer
    x = 16,491.69

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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.