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Finding the Fourth Proportional to 20,803.74, 31,199.13 and 6,949.50

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Solution

The fourth proportional to 20,803.74, 31,199.13 and 6,949.50 is: 10,422.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.74 : 31,199.13 = 6,949.50 : x
  2. Step 2: Convert to fraction form
    20,803.74/31,199.13 = 6,949.50/x
  3. Step 3: Cross multiply
    20,803.74x = 31,199.13 × 6,949.50
  4. Step 4: Simplify right side
    20,803.74x = 216,818,353.94
  5. Step 5: Solve for x
    x = 216,818,353.94/20,803.74
  6. Step 6: Final answer
    x = 10,422.09

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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.