Home / 13,605.50-20,405.88-3,610.32

Finding the Fourth Proportional to 13,605.50, 20,405.88 and 3,610.32

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Solution

The fourth proportional to 13,605.50, 20,405.88 and 3,610.32 is: 5,414.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.50 : 20,405.88 = 3,610.32 : x
  2. Step 2: Convert to fraction form
    13,605.50/20,405.88 = 3,610.32/x
  3. Step 3: Cross multiply
    13,605.50x = 20,405.88 × 3,610.32
  4. Step 4: Simplify right side
    13,605.50x = 73,671,756.68
  5. Step 5: Solve for x
    x = 73,671,756.68/13,605.50
  6. Step 6: Final answer
    x = 5,414.85

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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.