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Finding the Fourth Proportional to 8,679.79, 13,016.98 and 3,132.41

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Solution

The fourth proportional to 8,679.79, 13,016.98 and 3,132.41 is: 4,697.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.79 : 13,016.98 = 3,132.41 : x
  2. Step 2: Convert to fraction form
    8,679.79/13,016.98 = 3,132.41/x
  3. Step 3: Cross multiply
    8,679.79x = 13,016.98 × 3,132.41
  4. Step 4: Simplify right side
    8,679.79x = 40,774,543.03
  5. Step 5: Solve for x
    x = 40,774,543.03/8,679.79
  6. Step 6: Final answer
    x = 4,697.64

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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.