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Finding the Fourth Proportional to 13,757.48, 18,985.01 and 8,091.12

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Solution

The fourth proportional to 13,757.48, 18,985.01 and 8,091.12 is: 11,165.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.48 : 18,985.01 = 8,091.12 : x
  2. Step 2: Convert to fraction form
    13,757.48/18,985.01 = 8,091.12/x
  3. Step 3: Cross multiply
    13,757.48x = 18,985.01 × 8,091.12
  4. Step 4: Simplify right side
    13,757.48x = 153,609,953.66
  5. Step 5: Solve for x
    x = 153,609,953.66/13,757.48
  6. Step 6: Final answer
    x = 11,165.56

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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.