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Finding the Fourth Proportional to 29,468.56, 40,684.78 and 20,285.79

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Solution

The fourth proportional to 29,468.56, 40,684.78 and 20,285.79 is: 28,006.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,468.56 : 40,684.78 = 20,285.79 : x
  2. Step 2: Convert to fraction form
    29,468.56/40,684.78 = 20,285.79/x
  3. Step 3: Cross multiply
    29,468.56x = 40,684.78 × 20,285.79
  4. Step 4: Simplify right side
    29,468.56x = 825,322,903.28
  5. Step 5: Solve for x
    x = 825,322,903.28/29,468.56
  6. Step 6: Final answer
    x = 28,006.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.