Home / 13,689.09-20,530.62-3,825.72

Finding the Fourth Proportional to 13,689.09, 20,530.62 and 3,825.72

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Solution

The fourth proportional to 13,689.09, 20,530.62 and 3,825.72 is: 5,737.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.09 : 20,530.62 = 3,825.72 : x
  2. Step 2: Convert to fraction form
    13,689.09/20,530.62 = 3,825.72/x
  3. Step 3: Cross multiply
    13,689.09x = 20,530.62 × 3,825.72
  4. Step 4: Simplify right side
    13,689.09x = 78,544,403.55
  5. Step 5: Solve for x
    x = 78,544,403.55/13,689.09
  6. Step 6: Final answer
    x = 5,737.74

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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.