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Finding the Fourth Proportional to 18,783.87, 25,917.47 and 11,228.93

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Solution

The fourth proportional to 18,783.87, 25,917.47 and 11,228.93 is: 15,493.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.87 : 25,917.47 = 11,228.93 : x
  2. Step 2: Convert to fraction form
    18,783.87/25,917.47 = 11,228.93/x
  3. Step 3: Cross multiply
    18,783.87x = 25,917.47 × 11,228.93
  4. Step 4: Simplify right side
    18,783.87x = 291,025,409.97
  5. Step 5: Solve for x
    x = 291,025,409.97/18,783.87
  6. Step 6: Final answer
    x = 15,493.36

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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.