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Finding the Fourth Proportional to 13,245.90, 18,287.36 and 8,773.48

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Solution

The fourth proportional to 13,245.90, 18,287.36 and 8,773.48 is: 12,112.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.90 : 18,287.36 = 8,773.48 : x
  2. Step 2: Convert to fraction form
    13,245.90/18,287.36 = 8,773.48/x
  3. Step 3: Cross multiply
    13,245.90x = 18,287.36 × 8,773.48
  4. Step 4: Simplify right side
    13,245.90x = 160,443,809.15
  5. Step 5: Solve for x
    x = 160,443,809.15/13,245.90
  6. Step 6: Final answer
    x = 12,112.72

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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.