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Finding the Fourth Proportional to 12,459.72, 18,696.78 and 4,667.40

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Solution

The fourth proportional to 12,459.72, 18,696.78 and 4,667.40 is: 7,003.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,459.72 : 18,696.78 = 4,667.40 : x
  2. Step 2: Convert to fraction form
    12,459.72/18,696.78 = 4,667.40/x
  3. Step 3: Cross multiply
    12,459.72x = 18,696.78 × 4,667.40
  4. Step 4: Simplify right side
    12,459.72x = 87,265,350.97
  5. Step 5: Solve for x
    x = 87,265,350.97/12,459.72
  6. Step 6: Final answer
    x = 7,003.80

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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.