Home / 20,963.28-31,463.72-18,738.60

Finding the Fourth Proportional to 20,963.28, 31,463.72 and 18,738.60

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Solution

The fourth proportional to 20,963.28, 31,463.72 and 18,738.60 is: 28,124.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.28 : 31,463.72 = 18,738.60 : x
  2. Step 2: Convert to fraction form
    20,963.28/31,463.72 = 18,738.60/x
  3. Step 3: Cross multiply
    20,963.28x = 31,463.72 × 18,738.60
  4. Step 4: Simplify right side
    20,963.28x = 589,586,063.59
  5. Step 5: Solve for x
    x = 589,586,063.59/20,963.28
  6. Step 6: Final answer
    x = 28,124.70

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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.