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Finding the Fourth Proportional to 8,612.04, 11,880.99 and 5,419.68

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Solution

The fourth proportional to 8,612.04, 11,880.99 and 5,419.68 is: 7,476.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.04 : 11,880.99 = 5,419.68 : x
  2. Step 2: Convert to fraction form
    8,612.04/11,880.99 = 5,419.68/x
  3. Step 3: Cross multiply
    8,612.04x = 11,880.99 × 5,419.68
  4. Step 4: Simplify right side
    8,612.04x = 64,391,163.88
  5. Step 5: Solve for x
    x = 64,391,163.88/8,612.04
  6. Step 6: Final answer
    x = 7,476.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.