Home / 20,296.32-28,005.12-11,909.76

Finding the Fourth Proportional to 20,296.32, 28,005.12 and 11,909.76

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Solution

The fourth proportional to 20,296.32, 28,005.12 and 11,909.76 is: 16,433.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,296.32 : 28,005.12 = 11,909.76 : x
  2. Step 2: Convert to fraction form
    20,296.32/28,005.12 = 11,909.76/x
  3. Step 3: Cross multiply
    20,296.32x = 28,005.12 × 11,909.76
  4. Step 4: Simplify right side
    20,296.32x = 333,534,257.97
  5. Step 5: Solve for x
    x = 333,534,257.97/20,296.32
  6. Step 6: Final answer
    x = 16,433.24

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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.