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Finding the Fourth Proportional to 8,659.17, 12,986.79 and 4,216.71

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Solution

The fourth proportional to 8,659.17, 12,986.79 and 4,216.71 is: 6,324.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.17 : 12,986.79 = 4,216.71 : x
  2. Step 2: Convert to fraction form
    8,659.17/12,986.79 = 4,216.71/x
  3. Step 3: Cross multiply
    8,659.17x = 12,986.79 × 4,216.71
  4. Step 4: Simplify right side
    8,659.17x = 54,761,527.26
  5. Step 5: Solve for x
    x = 54,761,527.26/8,659.17
  6. Step 6: Final answer
    x = 6,324.11

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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.