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Finding the Fourth Proportional to 13,598.40, 20,397.60 and 3,739.20

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Solution

The fourth proportional to 13,598.40, 20,397.60 and 3,739.20 is: 5,608.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,598.40 : 20,397.60 = 3,739.20 : x
  2. Step 2: Convert to fraction form
    13,598.40/20,397.60 = 3,739.20/x
  3. Step 3: Cross multiply
    13,598.40x = 20,397.60 × 3,739.20
  4. Step 4: Simplify right side
    13,598.40x = 76,270,705.92
  5. Step 5: Solve for x
    x = 76,270,705.92/13,598.40
  6. Step 6: Final answer
    x = 5,608.80

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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.