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Finding the Fourth Proportional to 12,287.90, 18,433.04 and 4,890.63

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Solution

The fourth proportional to 12,287.90, 18,433.04 and 4,890.63 is: 7,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.90 : 18,433.04 = 4,890.63 : x
  2. Step 2: Convert to fraction form
    12,287.90/18,433.04 = 4,890.63/x
  3. Step 3: Cross multiply
    12,287.90x = 18,433.04 × 4,890.63
  4. Step 4: Simplify right side
    12,287.90x = 90,149,153.96
  5. Step 5: Solve for x
    x = 90,149,153.96/12,287.90
  6. Step 6: Final answer
    x = 7,336.42

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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.