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Finding the Fourth Proportional to 18,775.85, 25,900.65 and 11,609.78

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Solution

The fourth proportional to 18,775.85, 25,900.65 and 11,609.78 is: 16,015.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.85 : 25,900.65 = 11,609.78 : x
  2. Step 2: Convert to fraction form
    18,775.85/25,900.65 = 11,609.78/x
  3. Step 3: Cross multiply
    18,775.85x = 25,900.65 × 11,609.78
  4. Step 4: Simplify right side
    18,775.85x = 300,700,848.36
  5. Step 5: Solve for x
    x = 300,700,848.36/18,775.85
  6. Step 6: Final answer
    x = 16,015.30

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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.