Home / 21,936.38-30,286.05-15,219.86

Finding the Fourth Proportional to 21,936.38, 30,286.05 and 15,219.86

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Solution

The fourth proportional to 21,936.38, 30,286.05 and 15,219.86 is: 21,013.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.38 : 30,286.05 = 15,219.86 : x
  2. Step 2: Convert to fraction form
    21,936.38/30,286.05 = 15,219.86/x
  3. Step 3: Cross multiply
    21,936.38x = 30,286.05 × 15,219.86
  4. Step 4: Simplify right side
    21,936.38x = 460,949,440.95
  5. Step 5: Solve for x
    x = 460,949,440.95/21,936.38
  6. Step 6: Final answer
    x = 21,013.01

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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.