Home / 20,799.21-28,694.32-15,121.51

Finding the Fourth Proportional to 20,799.21, 28,694.32 and 15,121.51

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Solution

The fourth proportional to 20,799.21, 28,694.32 and 15,121.51 is: 20,861.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.21 : 28,694.32 = 15,121.51 : x
  2. Step 2: Convert to fraction form
    20,799.21/28,694.32 = 15,121.51/x
  3. Step 3: Cross multiply
    20,799.21x = 28,694.32 × 15,121.51
  4. Step 4: Simplify right side
    20,799.21x = 433,901,446.82
  5. Step 5: Solve for x
    x = 433,901,446.82/20,799.21
  6. Step 6: Final answer
    x = 20,861.44

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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.