Home / 12,321.20-16,996.20-8,335.28

Finding the Fourth Proportional to 12,321.20, 16,996.20 and 8,335.28

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Solution

The fourth proportional to 12,321.20, 16,996.20 and 8,335.28 is: 11,497.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.20 : 16,996.20 = 8,335.28 : x
  2. Step 2: Convert to fraction form
    12,321.20/16,996.20 = 8,335.28/x
  3. Step 3: Cross multiply
    12,321.20x = 16,996.20 × 8,335.28
  4. Step 4: Simplify right side
    12,321.20x = 141,668,085.94
  5. Step 5: Solve for x
    x = 141,668,085.94/12,321.20
  6. Step 6: Final answer
    x = 11,497.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.