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Finding the Fourth Proportional to 8,679.60, 13,019.40 and 6,800.40

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Solution

The fourth proportional to 8,679.60, 13,019.40 and 6,800.40 is: 10,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.60 : 13,019.40 = 6,800.40 : x
  2. Step 2: Convert to fraction form
    8,679.60/13,019.40 = 6,800.40/x
  3. Step 3: Cross multiply
    8,679.60x = 13,019.40 × 6,800.40
  4. Step 4: Simplify right side
    8,679.60x = 88,537,127.76
  5. Step 5: Solve for x
    x = 88,537,127.76/8,679.60
  6. Step 6: Final answer
    x = 10,200.60

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.