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Finding the Fourth Proportional to 13,739.86, 18,954.03 and 8,695.58

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Solution

The fourth proportional to 13,739.86, 18,954.03 and 8,695.58 is: 11,995.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.86 : 18,954.03 = 8,695.58 : x
  2. Step 2: Convert to fraction form
    13,739.86/18,954.03 = 8,695.58/x
  3. Step 3: Cross multiply
    13,739.86x = 18,954.03 × 8,695.58
  4. Step 4: Simplify right side
    13,739.86x = 164,816,284.19
  5. Step 5: Solve for x
    x = 164,816,284.19/13,739.86
  6. Step 6: Final answer
    x = 11,995.48

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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.