Home / 20,491.50-30,740.34-7,340.75

Finding the Fourth Proportional to 20,491.50, 30,740.34 and 7,340.75

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Solution

The fourth proportional to 20,491.50, 30,740.34 and 7,340.75 is: 11,012.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.50 : 30,740.34 = 7,340.75 : x
  2. Step 2: Convert to fraction form
    20,491.50/30,740.34 = 7,340.75/x
  3. Step 3: Cross multiply
    20,491.50x = 30,740.34 × 7,340.75
  4. Step 4: Simplify right side
    20,491.50x = 225,656,997.15
  5. Step 5: Solve for x
    x = 225,656,997.15/20,491.50
  6. Step 6: Final answer
    x = 11,012.22

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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.