Home / 13,409.20-20,108.65-6,383.80

Finding the Fourth Proportional to 13,409.20, 20,108.65 and 6,383.80

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Solution

The fourth proportional to 13,409.20, 20,108.65 and 6,383.80 is: 9,573.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.20 : 20,108.65 = 6,383.80 : x
  2. Step 2: Convert to fraction form
    13,409.20/20,108.65 = 6,383.80/x
  3. Step 3: Cross multiply
    13,409.20x = 20,108.65 × 6,383.80
  4. Step 4: Simplify right side
    13,409.20x = 128,369,599.87
  5. Step 5: Solve for x
    x = 128,369,599.87/13,409.20
  6. Step 6: Final answer
    x = 9,573.25

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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.