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Finding the Fourth Proportional to 8,216.68, 11,325.68 and 6,421

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Solution

The fourth proportional to 8,216.68, 11,325.68 and 6,421 is: 8,850.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,216.68 : 11,325.68 = 6,421 : x
  2. Step 2: Convert to fraction form
    8,216.68/11,325.68 = 6,421/x
  3. Step 3: Cross multiply
    8,216.68x = 11,325.68 × 6,421
  4. Step 4: Simplify right side
    8,216.68x = 72,722,191.28
  5. Step 5: Solve for x
    x = 72,722,191.28/8,216.68
  6. Step 6: Final answer
    x = 8,850.56

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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.