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Finding the Fourth Proportional to 18,954.71, 26,157.21 and 10,998.31

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Solution

The fourth proportional to 18,954.71, 26,157.21 and 10,998.31 is: 15,177.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.71 : 26,157.21 = 10,998.31 : x
  2. Step 2: Convert to fraction form
    18,954.71/26,157.21 = 10,998.31/x
  3. Step 3: Cross multiply
    18,954.71x = 26,157.21 × 10,998.31
  4. Step 4: Simplify right side
    18,954.71x = 287,685,104.32
  5. Step 5: Solve for x
    x = 287,685,104.32/18,954.71
  6. Step 6: Final answer
    x = 15,177.50

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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.