Home / 13,405.70-20,103.40-6,380.30

Finding the Fourth Proportional to 13,405.70, 20,103.40 and 6,380.30

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Solution

The fourth proportional to 13,405.70, 20,103.40 and 6,380.30 is: 9,568.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.70 : 20,103.40 = 6,380.30 : x
  2. Step 2: Convert to fraction form
    13,405.70/20,103.40 = 6,380.30/x
  3. Step 3: Cross multiply
    13,405.70x = 20,103.40 × 6,380.30
  4. Step 4: Simplify right side
    13,405.70x = 128,265,723.02
  5. Step 5: Solve for x
    x = 128,265,723.02/13,405.70
  6. Step 6: Final answer
    x = 9,568.00

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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.