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Finding the Fourth Proportional to 12,281.87, 18,422.66 and 7,352.88

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Solution

The fourth proportional to 12,281.87, 18,422.66 and 7,352.88 is: 11,029.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.87 : 18,422.66 = 7,352.88 : x
  2. Step 2: Convert to fraction form
    12,281.87/18,422.66 = 7,352.88/x
  3. Step 3: Cross multiply
    12,281.87x = 18,422.66 × 7,352.88
  4. Step 4: Simplify right side
    12,281.87x = 135,459,571.50
  5. Step 5: Solve for x
    x = 135,459,571.50/12,281.87
  6. Step 6: Final answer
    x = 11,029.23

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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.