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Finding the Fourth Proportional to 13,403.20, 20,101.20 and 5,610.40

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Solution

The fourth proportional to 13,403.20, 20,101.20 and 5,610.40 is: 8,414.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,403.20 : 20,101.20 = 5,610.40 : x
  2. Step 2: Convert to fraction form
    13,403.20/20,101.20 = 5,610.40/x
  3. Step 3: Cross multiply
    13,403.20x = 20,101.20 × 5,610.40
  4. Step 4: Simplify right side
    13,403.20x = 112,775,772.48
  5. Step 5: Solve for x
    x = 112,775,772.48/13,403.20
  6. Step 6: Final answer
    x = 8,414.09

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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.