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Finding the Fourth Proportional to 18,763.75, 25,889.73 and 11,208.60

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Solution

The fourth proportional to 18,763.75, 25,889.73 and 11,208.60 is: 15,465.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.75 : 25,889.73 = 11,208.60 : x
  2. Step 2: Convert to fraction form
    18,763.75/25,889.73 = 11,208.60/x
  3. Step 3: Cross multiply
    18,763.75x = 25,889.73 × 11,208.60
  4. Step 4: Simplify right side
    18,763.75x = 290,187,669.71
  5. Step 5: Solve for x
    x = 290,187,669.71/18,763.75
  6. Step 6: Final answer
    x = 15,465.34

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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.