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Finding the Fourth Proportional to 13,699.13, 18,904.79 and 8,110.13

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Solution

The fourth proportional to 13,699.13, 18,904.79 and 8,110.13 is: 11,191.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.13 : 18,904.79 = 8,110.13 : x
  2. Step 2: Convert to fraction form
    13,699.13/18,904.79 = 8,110.13/x
  3. Step 3: Cross multiply
    13,699.13x = 18,904.79 × 8,110.13
  4. Step 4: Simplify right side
    13,699.13x = 153,320,230.27
  5. Step 5: Solve for x
    x = 153,320,230.27/13,699.13
  6. Step 6: Final answer
    x = 11,191.97

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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.