Home / 13,686.82-20,530.20-3,298.57

Finding the Fourth Proportional to 13,686.82, 20,530.20 and 3,298.57

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Solution

The fourth proportional to 13,686.82, 20,530.20 and 3,298.57 is: 4,947.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.82 : 20,530.20 = 3,298.57 : x
  2. Step 2: Convert to fraction form
    13,686.82/20,530.20 = 3,298.57/x
  3. Step 3: Cross multiply
    13,686.82x = 20,530.20 × 3,298.57
  4. Step 4: Simplify right side
    13,686.82x = 67,720,355.15
  5. Step 5: Solve for x
    x = 67,720,355.15/13,686.82
  6. Step 6: Final answer
    x = 4,947.85

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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.