Home / 20,403-28,156.24-11,910.96

Finding the Fourth Proportional to 20,403, 28,156.24 and 11,910.96

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Solution

The fourth proportional to 20,403, 28,156.24 and 11,910.96 is: 16,437.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403 : 28,156.24 = 11,910.96 : x
  2. Step 2: Convert to fraction form
    20,403/28,156.24 = 11,910.96/x
  3. Step 3: Cross multiply
    20,403x = 28,156.24 × 11,910.96
  4. Step 4: Simplify right side
    20,403x = 335,367,863.28
  5. Step 5: Solve for x
    x = 335,367,863.28/20,403
  6. Step 6: Final answer
    x = 16,437.18

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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.