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Finding the Fourth Proportional to 18,763.72, 25,889.07 and 11,206.72

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Solution

The fourth proportional to 18,763.72, 25,889.07 and 11,206.72 is: 15,462.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.72 : 25,889.07 = 11,206.72 : x
  2. Step 2: Convert to fraction form
    18,763.72/25,889.07 = 11,206.72/x
  3. Step 3: Cross multiply
    18,763.72x = 25,889.07 × 11,206.72
  4. Step 4: Simplify right side
    18,763.72x = 290,131,569.90
  5. Step 5: Solve for x
    x = 290,131,569.90/18,763.72
  6. Step 6: Final answer
    x = 15,462.37

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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.