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Finding the Fourth Proportional to 18,515.72, 25,551.72 and 10,558.01

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Solution

The fourth proportional to 18,515.72, 25,551.72 and 10,558.01 is: 14,570.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.72 : 25,551.72 = 10,558.01 : x
  2. Step 2: Convert to fraction form
    18,515.72/25,551.72 = 10,558.01/x
  3. Step 3: Cross multiply
    18,515.72x = 25,551.72 × 10,558.01
  4. Step 4: Simplify right side
    18,515.72x = 269,775,379.16
  5. Step 5: Solve for x
    x = 269,775,379.16/18,515.72
  6. Step 6: Final answer
    x = 14,570.07

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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.