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Finding the Fourth Proportional to 18,969.39, 26,178.39 and 11,011.14

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Solution

The fourth proportional to 18,969.39, 26,178.39 and 11,011.14 is: 15,195.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.39 : 26,178.39 = 11,011.14 : x
  2. Step 2: Convert to fraction form
    18,969.39/26,178.39 = 11,011.14/x
  3. Step 3: Cross multiply
    18,969.39x = 26,178.39 × 11,011.14
  4. Step 4: Simplify right side
    18,969.39x = 288,253,917.26
  5. Step 5: Solve for x
    x = 288,253,917.26/18,969.39
  6. Step 6: Final answer
    x = 15,195.74

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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.