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Finding the Fourth Proportional to 8,630.46, 12,958.65 and 4,936.86

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Solution

The fourth proportional to 8,630.46, 12,958.65 and 4,936.86 is: 7,412.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.46 : 12,958.65 = 4,936.86 : x
  2. Step 2: Convert to fraction form
    8,630.46/12,958.65 = 4,936.86/x
  3. Step 3: Cross multiply
    8,630.46x = 12,958.65 × 4,936.86
  4. Step 4: Simplify right side
    8,630.46x = 63,975,040.84
  5. Step 5: Solve for x
    x = 63,975,040.84/8,630.46
  6. Step 6: Final answer
    x = 7,412.70

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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.