Home / 20,310.92-28,028.84-11,358.30

Finding the Fourth Proportional to 20,310.92, 28,028.84 and 11,358.30

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Solution

The fourth proportional to 20,310.92, 28,028.84 and 11,358.30 is: 15,674.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.92 : 28,028.84 = 11,358.30 : x
  2. Step 2: Convert to fraction form
    20,310.92/28,028.84 = 11,358.30/x
  3. Step 3: Cross multiply
    20,310.92x = 28,028.84 × 11,358.30
  4. Step 4: Simplify right side
    20,310.92x = 318,359,973.37
  5. Step 5: Solve for x
    x = 318,359,973.37/20,310.92
  6. Step 6: Final answer
    x = 15,674.33

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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.