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Finding the Fourth Proportional to 19,887.75, 27,445.75 and 10,935.90

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Solution

The fourth proportional to 19,887.75, 27,445.75 and 10,935.90 is: 15,091.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,887.75 : 27,445.75 = 10,935.90 : x
  2. Step 2: Convert to fraction form
    19,887.75/27,445.75 = 10,935.90/x
  3. Step 3: Cross multiply
    19,887.75x = 27,445.75 × 10,935.90
  4. Step 4: Simplify right side
    19,887.75x = 300,143,950.09
  5. Step 5: Solve for x
    x = 300,143,950.09/19,887.75
  6. Step 6: Final answer
    x = 15,091.90

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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.