Home / 20,821.05-28,733.73-11,868.39

Finding the Fourth Proportional to 20,821.05, 28,733.73 and 11,868.39

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Solution

The fourth proportional to 20,821.05, 28,733.73 and 11,868.39 is: 16,378.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.05 : 28,733.73 = 11,868.39 : x
  2. Step 2: Convert to fraction form
    20,821.05/28,733.73 = 11,868.39/x
  3. Step 3: Cross multiply
    20,821.05x = 28,733.73 × 11,868.39
  4. Step 4: Simplify right side
    20,821.05x = 341,023,113.79
  5. Step 5: Solve for x
    x = 341,023,113.79/20,821.05
  6. Step 6: Final answer
    x = 16,378.77

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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.