Home / 13,780.47-18,989.82-9,794.64

Finding the Fourth Proportional to 13,780.47, 18,989.82 and 9,794.64

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Solution

The fourth proportional to 13,780.47, 18,989.82 and 9,794.64 is: 13,497.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.47 : 18,989.82 = 9,794.64 : x
  2. Step 2: Convert to fraction form
    13,780.47/18,989.82 = 9,794.64/x
  3. Step 3: Cross multiply
    13,780.47x = 18,989.82 × 9,794.64
  4. Step 4: Simplify right side
    13,780.47x = 185,998,450.56
  5. Step 5: Solve for x
    x = 185,998,450.56/13,780.47
  6. Step 6: Final answer
    x = 13,497.25

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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.