Home / 20,884.68-28,821.72-11,453.64

Finding the Fourth Proportional to 20,884.68, 28,821.72 and 11,453.64

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Solution

The fourth proportional to 20,884.68, 28,821.72 and 11,453.64 is: 15,806.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.68 : 28,821.72 = 11,453.64 : x
  2. Step 2: Convert to fraction form
    20,884.68/28,821.72 = 11,453.64/x
  3. Step 3: Cross multiply
    20,884.68x = 28,821.72 × 11,453.64
  4. Step 4: Simplify right side
    20,884.68x = 330,113,605.06
  5. Step 5: Solve for x
    x = 330,113,605.06/20,884.68
  6. Step 6: Final answer
    x = 15,806.50

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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.