Home / 13,540.40-20,309.84-4,305.68

Finding the Fourth Proportional to 13,540.40, 20,309.84 and 4,305.68

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Solution

The fourth proportional to 13,540.40, 20,309.84 and 4,305.68 is: 6,458.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.40 : 20,309.84 = 4,305.68 : x
  2. Step 2: Convert to fraction form
    13,540.40/20,309.84 = 4,305.68/x
  3. Step 3: Cross multiply
    13,540.40x = 20,309.84 × 4,305.68
  4. Step 4: Simplify right side
    13,540.40x = 87,447,671.89
  5. Step 5: Solve for x
    x = 87,447,671.89/13,540.40
  6. Step 6: Final answer
    x = 6,458.28

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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.