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Finding the Fourth Proportional to 12,188.97, 18,284.97 and 4,289.64

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Solution

The fourth proportional to 12,188.97, 18,284.97 and 4,289.64 is: 6,434.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,188.97 : 18,284.97 = 4,289.64 : x
  2. Step 2: Convert to fraction form
    12,188.97/18,284.97 = 4,289.64/x
  3. Step 3: Cross multiply
    12,188.97x = 18,284.97 × 4,289.64
  4. Step 4: Simplify right side
    12,188.97x = 78,435,938.71
  5. Step 5: Solve for x
    x = 78,435,938.71/12,188.97
  6. Step 6: Final answer
    x = 6,434.99

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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.