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Finding the Fourth Proportional to 20,480.64, 30,654.54 and 19,004.28

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Solution

The fourth proportional to 20,480.64, 30,654.54 and 19,004.28 is: 28,444.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.64 : 30,654.54 = 19,004.28 : x
  2. Step 2: Convert to fraction form
    20,480.64/30,654.54 = 19,004.28/x
  3. Step 3: Cross multiply
    20,480.64x = 30,654.54 × 19,004.28
  4. Step 4: Simplify right side
    20,480.64x = 582,567,461.43
  5. Step 5: Solve for x
    x = 582,567,461.43/20,480.64
  6. Step 6: Final answer
    x = 28,444.79

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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.