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Finding the Fourth Proportional to 12,284.40, 18,406.86 and 7,351.70

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Solution

The fourth proportional to 12,284.40, 18,406.86 and 7,351.70 is: 11,015.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,284.40 : 18,406.86 = 7,351.70 : x
  2. Step 2: Convert to fraction form
    12,284.40/18,406.86 = 7,351.70/x
  3. Step 3: Cross multiply
    12,284.40x = 18,406.86 × 7,351.70
  4. Step 4: Simplify right side
    12,284.40x = 135,321,712.66
  5. Step 5: Solve for x
    x = 135,321,712.66/12,284.40
  6. Step 6: Final answer
    x = 11,015.74

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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.