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Finding the Fourth Proportional to 18,769.80, 25,902.96 and 10,813.68

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Solution

The fourth proportional to 18,769.80, 25,902.96 and 10,813.68 is: 14,923.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,769.80 : 25,902.96 = 10,813.68 : x
  2. Step 2: Convert to fraction form
    18,769.80/25,902.96 = 10,813.68/x
  3. Step 3: Cross multiply
    18,769.80x = 25,902.96 × 10,813.68
  4. Step 4: Simplify right side
    18,769.80x = 280,106,320.49
  5. Step 5: Solve for x
    x = 280,106,320.49/18,769.80
  6. Step 6: Final answer
    x = 14,923.24

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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.