Home / 13,519.71-20,280.34-3,659.78

Finding the Fourth Proportional to 13,519.71, 20,280.34 and 3,659.78

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Solution

The fourth proportional to 13,519.71, 20,280.34 and 3,659.78 is: 5,489.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,519.71 : 20,280.34 = 3,659.78 : x
  2. Step 2: Convert to fraction form
    13,519.71/20,280.34 = 3,659.78/x
  3. Step 3: Cross multiply
    13,519.71x = 20,280.34 × 3,659.78
  4. Step 4: Simplify right side
    13,519.71x = 74,221,638.00
  5. Step 5: Solve for x
    x = 74,221,638.00/13,519.71
  6. Step 6: Final answer
    x = 5,489.88

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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.