Home / 13,841.91-20,760.64-3,978.95

Finding the Fourth Proportional to 13,841.91, 20,760.64 and 3,978.95

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Solution

The fourth proportional to 13,841.91, 20,760.64 and 3,978.95 is: 5,967.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,841.91 : 20,760.64 = 3,978.95 : x
  2. Step 2: Convert to fraction form
    13,841.91/20,760.64 = 3,978.95/x
  3. Step 3: Cross multiply
    13,841.91x = 20,760.64 × 3,978.95
  4. Step 4: Simplify right side
    13,841.91x = 82,605,434.78
  5. Step 5: Solve for x
    x = 82,605,434.78/13,841.91
  6. Step 6: Final answer
    x = 5,967.78

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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.