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Finding the Fourth Proportional to 13,654.22, 18,842.83 and 7,990.06

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Solution

The fourth proportional to 13,654.22, 18,842.83 and 7,990.06 is: 11,026.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,654.22 : 18,842.83 = 7,990.06 : x
  2. Step 2: Convert to fraction form
    13,654.22/18,842.83 = 7,990.06/x
  3. Step 3: Cross multiply
    13,654.22x = 18,842.83 × 7,990.06
  4. Step 4: Simplify right side
    13,654.22x = 150,555,251.63
  5. Step 5: Solve for x
    x = 150,555,251.63/13,654.22
  6. Step 6: Final answer
    x = 11,026.28

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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.