Home / 20,738.58-31,107.99-5,156.21

Finding the Fourth Proportional to 20,738.58, 31,107.99 and 5,156.21

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Solution

The fourth proportional to 20,738.58, 31,107.99 and 5,156.21 is: 7,734.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.58 : 31,107.99 = 5,156.21 : x
  2. Step 2: Convert to fraction form
    20,738.58/31,107.99 = 5,156.21/x
  3. Step 3: Cross multiply
    20,738.58x = 31,107.99 × 5,156.21
  4. Step 4: Simplify right side
    20,738.58x = 160,399,329.12
  5. Step 5: Solve for x
    x = 160,399,329.12/20,738.58
  6. Step 6: Final answer
    x = 7,734.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.