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Finding the Fourth Proportional to 20,490.40, 30,735.60 and 18,301.60

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Solution

The fourth proportional to 20,490.40, 30,735.60 and 18,301.60 is: 27,452.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.40 : 30,735.60 = 18,301.60 : x
  2. Step 2: Convert to fraction form
    20,490.40/30,735.60 = 18,301.60/x
  3. Step 3: Cross multiply
    20,490.40x = 30,735.60 × 18,301.60
  4. Step 4: Simplify right side
    20,490.40x = 562,510,656.96
  5. Step 5: Solve for x
    x = 562,510,656.96/20,490.40
  6. Step 6: Final answer
    x = 27,452.40

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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.