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Finding the Fourth Proportional to 18,969.44, 26,178.69 and 10,905.71

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Solution

The fourth proportional to 18,969.44, 26,178.69 and 10,905.71 is: 15,050.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.44 : 26,178.69 = 10,905.71 : x
  2. Step 2: Convert to fraction form
    18,969.44/26,178.69 = 10,905.71/x
  3. Step 3: Cross multiply
    18,969.44x = 26,178.69 × 10,905.71
  4. Step 4: Simplify right side
    18,969.44x = 285,497,070.43
  5. Step 5: Solve for x
    x = 285,497,070.43/18,969.44
  6. Step 6: Final answer
    x = 15,050.37

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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.