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Finding the Fourth Proportional to 18,759.58, 28,131.06 and 5,609.50

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Solution

The fourth proportional to 18,759.58, 28,131.06 and 5,609.50 is: 8,411.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.58 : 28,131.06 = 5,609.50 : x
  2. Step 2: Convert to fraction form
    18,759.58/28,131.06 = 5,609.50/x
  3. Step 3: Cross multiply
    18,759.58x = 28,131.06 × 5,609.50
  4. Step 4: Simplify right side
    18,759.58x = 157,801,181.07
  5. Step 5: Solve for x
    x = 157,801,181.07/18,759.58
  6. Step 6: Final answer
    x = 8,411.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.