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Finding the Fourth Proportional to 20,736, 31,259.52 and 20,424.96

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Solution

The fourth proportional to 20,736, 31,259.52 and 20,424.96 is: 30,790.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736 : 31,259.52 = 20,424.96 : x
  2. Step 2: Convert to fraction form
    20,736/31,259.52 = 20,424.96/x
  3. Step 3: Cross multiply
    20,736x = 31,259.52 × 20,424.96
  4. Step 4: Simplify right side
    20,736x = 638,474,445.62
  5. Step 5: Solve for x
    x = 638,474,445.62/20,736
  6. Step 6: Final answer
    x = 30,790.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.