Home / 13,409.20-20,116.04-5,618.60

Finding the Fourth Proportional to 13,409.20, 20,116.04 and 5,618.60

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Solution

The fourth proportional to 13,409.20, 20,116.04 and 5,618.60 is: 8,428.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.20 : 20,116.04 = 5,618.60 : x
  2. Step 2: Convert to fraction form
    13,409.20/20,116.04 = 5,618.60/x
  3. Step 3: Cross multiply
    13,409.20x = 20,116.04 × 5,618.60
  4. Step 4: Simplify right side
    13,409.20x = 113,023,982.34
  5. Step 5: Solve for x
    x = 113,023,982.34/13,409.20
  6. Step 6: Final answer
    x = 8,428.84

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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.