Home / 13,841.32-20,761.72-3,980.64

Finding the Fourth Proportional to 13,841.32, 20,761.72 and 3,980.64

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Solution

The fourth proportional to 13,841.32, 20,761.72 and 3,980.64 is: 5,970.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,841.32 : 20,761.72 = 3,980.64 : x
  2. Step 2: Convert to fraction form
    13,841.32/20,761.72 = 3,980.64/x
  3. Step 3: Cross multiply
    13,841.32x = 20,761.72 × 3,980.64
  4. Step 4: Simplify right side
    13,841.32x = 82,644,933.10
  5. Step 5: Solve for x
    x = 82,644,933.10/13,841.32
  6. Step 6: Final answer
    x = 5,970.89

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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.