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Finding the Fourth Proportional to 12,235.90, 18,367.50 and 11,432.80

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Solution

The fourth proportional to 12,235.90, 18,367.50 and 11,432.80 is: 17,161.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,235.90 : 18,367.50 = 11,432.80 : x
  2. Step 2: Convert to fraction form
    12,235.90/18,367.50 = 11,432.80/x
  3. Step 3: Cross multiply
    12,235.90x = 18,367.50 × 11,432.80
  4. Step 4: Simplify right side
    12,235.90x = 209,991,954
  5. Step 5: Solve for x
    x = 209,991,954/12,235.90
  6. Step 6: Final answer
    x = 17,161.95

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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.