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Finding the Fourth Proportional to 7,119.95, 10,679.94 and 3,219.80

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Solution

The fourth proportional to 7,119.95, 10,679.94 and 3,219.80 is: 4,829.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,119.95 : 10,679.94 = 3,219.80 : x
  2. Step 2: Convert to fraction form
    7,119.95/10,679.94 = 3,219.80/x
  3. Step 3: Cross multiply
    7,119.95x = 10,679.94 × 3,219.80
  4. Step 4: Simplify right side
    7,119.95x = 34,387,217.41
  5. Step 5: Solve for x
    x = 34,387,217.41/7,119.95
  6. Step 6: Final answer
    x = 4,829.70

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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.