Home / 20,721.44-31,074.84-6,680.90

Finding the Fourth Proportional to 20,721.44, 31,074.84 and 6,680.90

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Solution

The fourth proportional to 20,721.44, 31,074.84 and 6,680.90 is: 10,018.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.44 : 31,074.84 = 6,680.90 : x
  2. Step 2: Convert to fraction form
    20,721.44/31,074.84 = 6,680.90/x
  3. Step 3: Cross multiply
    20,721.44x = 31,074.84 × 6,680.90
  4. Step 4: Simplify right side
    20,721.44x = 207,607,898.56
  5. Step 5: Solve for x
    x = 207,607,898.56/20,721.44
  6. Step 6: Final answer
    x = 10,018.99

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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.