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Finding the Fourth Proportional to 18,783.57, 25,923.54 and 11,229.81

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Solution

The fourth proportional to 18,783.57, 25,923.54 and 11,229.81 is: 15,498.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.57 : 25,923.54 = 11,229.81 : x
  2. Step 2: Convert to fraction form
    18,783.57/25,923.54 = 11,229.81/x
  3. Step 3: Cross multiply
    18,783.57x = 25,923.54 × 11,229.81
  4. Step 4: Simplify right side
    18,783.57x = 291,116,428.73
  5. Step 5: Solve for x
    x = 291,116,428.73/18,783.57
  6. Step 6: Final answer
    x = 15,498.46

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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.