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Finding the Fourth Proportional to 18,759.73, 28,139.73 and 5,612.35

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Solution

The fourth proportional to 18,759.73, 28,139.73 and 5,612.35 is: 8,418.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.73 : 28,139.73 = 5,612.35 : x
  2. Step 2: Convert to fraction form
    18,759.73/28,139.73 = 5,612.35/x
  3. Step 3: Cross multiply
    18,759.73x = 28,139.73 × 5,612.35
  4. Step 4: Simplify right side
    18,759.73x = 157,930,013.67
  5. Step 5: Solve for x
    x = 157,930,013.67/18,759.73
  6. Step 6: Final answer
    x = 8,418.57

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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.