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Finding the Fourth Proportional to 8,812.68, 13,215.87 and 4,131.90

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Solution

The fourth proportional to 8,812.68, 13,215.87 and 4,131.90 is: 6,196.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.68 : 13,215.87 = 4,131.90 : x
  2. Step 2: Convert to fraction form
    8,812.68/13,215.87 = 4,131.90/x
  3. Step 3: Cross multiply
    8,812.68x = 13,215.87 × 4,131.90
  4. Step 4: Simplify right side
    8,812.68x = 54,606,653.25
  5. Step 5: Solve for x
    x = 54,606,653.25/8,812.68
  6. Step 6: Final answer
    x = 6,196.37

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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.