Home / 13,841.44-20,758.80-3,978.40

Finding the Fourth Proportional to 13,841.44, 20,758.80 and 3,978.40

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Solution

The fourth proportional to 13,841.44, 20,758.80 and 3,978.40 is: 5,966.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,841.44 : 20,758.80 = 3,978.40 : x
  2. Step 2: Convert to fraction form
    13,841.44/20,758.80 = 3,978.40/x
  3. Step 3: Cross multiply
    13,841.44x = 20,758.80 × 3,978.40
  4. Step 4: Simplify right side
    13,841.44x = 82,586,809.92
  5. Step 5: Solve for x
    x = 82,586,809.92/13,841.44
  6. Step 6: Final answer
    x = 5,966.63

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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.