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Finding the Fourth Proportional to 18,487.14, 25,515.12 and 11,775.72

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Solution

The fourth proportional to 18,487.14, 25,515.12 and 11,775.72 is: 16,252.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.14 : 25,515.12 = 11,775.72 : x
  2. Step 2: Convert to fraction form
    18,487.14/25,515.12 = 11,775.72/x
  3. Step 3: Cross multiply
    18,487.14x = 25,515.12 × 11,775.72
  4. Step 4: Simplify right side
    18,487.14x = 300,458,908.89
  5. Step 5: Solve for x
    x = 300,458,908.89/18,487.14
  6. Step 6: Final answer
    x = 16,252.32

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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.