Home / 13,780.14-20,671.42-4,420.59

Finding the Fourth Proportional to 13,780.14, 20,671.42 and 4,420.59

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Solution

The fourth proportional to 13,780.14, 20,671.42 and 4,420.59 is: 6,631.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.14 : 20,671.42 = 4,420.59 : x
  2. Step 2: Convert to fraction form
    13,780.14/20,671.42 = 4,420.59/x
  3. Step 3: Cross multiply
    13,780.14x = 20,671.42 × 4,420.59
  4. Step 4: Simplify right side
    13,780.14x = 91,379,872.54
  5. Step 5: Solve for x
    x = 91,379,872.54/13,780.14
  6. Step 6: Final answer
    x = 6,631.27

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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.