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Finding the Fourth Proportional to 18,998.60, 26,212.26 and 11,039.30

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Solution

The fourth proportional to 18,998.60, 26,212.26 and 11,039.30 is: 15,230.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.60 : 26,212.26 = 11,039.30 : x
  2. Step 2: Convert to fraction form
    18,998.60/26,212.26 = 11,039.30/x
  3. Step 3: Cross multiply
    18,998.60x = 26,212.26 × 11,039.30
  4. Step 4: Simplify right side
    18,998.60x = 289,365,001.82
  5. Step 5: Solve for x
    x = 289,365,001.82/18,998.60
  6. Step 6: Final answer
    x = 15,230.86

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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.