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Finding the Fourth Proportional to 22,471.68, 30,996.48 and 13,639.68

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Solution

The fourth proportional to 22,471.68, 30,996.48 and 13,639.68 is: 18,813.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,471.68 : 30,996.48 = 13,639.68 : x
  2. Step 2: Convert to fraction form
    22,471.68/30,996.48 = 13,639.68/x
  3. Step 3: Cross multiply
    22,471.68x = 30,996.48 × 13,639.68
  4. Step 4: Simplify right side
    22,471.68x = 422,782,068.33
  5. Step 5: Solve for x
    x = 422,782,068.33/22,471.68
  6. Step 6: Final answer
    x = 18,813.99

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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.