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Finding the Fourth Proportional to 18,515.19, 25,544.64 and 10,551.81

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Solution

The fourth proportional to 18,515.19, 25,544.64 and 10,551.81 is: 14,557.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.19 : 25,544.64 = 10,551.81 : x
  2. Step 2: Convert to fraction form
    18,515.19/25,544.64 = 10,551.81/x
  3. Step 3: Cross multiply
    18,515.19x = 25,544.64 × 10,551.81
  4. Step 4: Simplify right side
    18,515.19x = 269,542,187.80
  5. Step 5: Solve for x
    x = 269,542,187.80/18,515.19
  6. Step 6: Final answer
    x = 14,557.89

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Half scale
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Double scale
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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.