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Finding the Fourth Proportional to 12,243.60, 16,890.40 and 8,879.03

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Solution

The fourth proportional to 12,243.60, 16,890.40 and 8,879.03 is: 12,248.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,243.60 : 16,890.40 = 8,879.03 : x
  2. Step 2: Convert to fraction form
    12,243.60/16,890.40 = 8,879.03/x
  3. Step 3: Cross multiply
    12,243.60x = 16,890.40 × 8,879.03
  4. Step 4: Simplify right side
    12,243.60x = 149,970,388.34
  5. Step 5: Solve for x
    x = 149,970,388.34/12,243.60
  6. Step 6: Final answer
    x = 12,248.88

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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.