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Finding the Fourth Proportional to 19,487.25, 26,895.04 and 10,991.12

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Solution

The fourth proportional to 19,487.25, 26,895.04 and 10,991.12 is: 15,169.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,487.25 : 26,895.04 = 10,991.12 : x
  2. Step 2: Convert to fraction form
    19,487.25/26,895.04 = 10,991.12/x
  3. Step 3: Cross multiply
    19,487.25x = 26,895.04 × 10,991.12
  4. Step 4: Simplify right side
    19,487.25x = 295,606,450.09
  5. Step 5: Solve for x
    x = 295,606,450.09/19,487.25
  6. Step 6: Final answer
    x = 15,169.22

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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.