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Finding the Fourth Proportional to 13,610.40, 20,410.80 and 6,218.40

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Solution

The fourth proportional to 13,610.40, 20,410.80 and 6,218.40 is: 9,325.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,610.40 : 20,410.80 = 6,218.40 : x
  2. Step 2: Convert to fraction form
    13,610.40/20,410.80 = 6,218.40/x
  3. Step 3: Cross multiply
    13,610.40x = 20,410.80 × 6,218.40
  4. Step 4: Simplify right side
    13,610.40x = 126,922,518.72
  5. Step 5: Solve for x
    x = 126,922,518.72/13,610.40
  6. Step 6: Final answer
    x = 9,325.41

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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.