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Finding the Fourth Proportional to 18,520.26, 27,780.40 and 4,669.26

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Solution

The fourth proportional to 18,520.26, 27,780.40 and 4,669.26 is: 7,003.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.26 : 27,780.40 = 4,669.26 : x
  2. Step 2: Convert to fraction form
    18,520.26/27,780.40 = 4,669.26/x
  3. Step 3: Cross multiply
    18,520.26x = 27,780.40 × 4,669.26
  4. Step 4: Simplify right side
    18,520.26x = 129,713,910.50
  5. Step 5: Solve for x
    x = 129,713,910.50/18,520.26
  6. Step 6: Final answer
    x = 7,003.89

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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.