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Finding the Fourth Proportional to 7,419.99, 11,131.64 and 2,489.50

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Solution

The fourth proportional to 7,419.99, 11,131.64 and 2,489.50 is: 3,734.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,419.99 : 11,131.64 = 2,489.50 : x
  2. Step 2: Convert to fraction form
    7,419.99/11,131.64 = 2,489.50/x
  3. Step 3: Cross multiply
    7,419.99x = 11,131.64 × 2,489.50
  4. Step 4: Simplify right side
    7,419.99x = 27,712,242.59
  5. Step 5: Solve for x
    x = 27,712,242.59/7,419.99
  6. Step 6: Final answer
    x = 3,734.81

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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.