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Finding the Fourth Proportional to 20,463.20, 30,694.88 and 5,673.28

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Solution

The fourth proportional to 20,463.20, 30,694.88 and 5,673.28 is: 8,509.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,463.20 : 30,694.88 = 5,673.28 : x
  2. Step 2: Convert to fraction form
    20,463.20/30,694.88 = 5,673.28/x
  3. Step 3: Cross multiply
    20,463.20x = 30,694.88 × 5,673.28
  4. Step 4: Simplify right side
    20,463.20x = 174,140,648.81
  5. Step 5: Solve for x
    x = 174,140,648.81/20,463.20
  6. Step 6: Final answer
    x = 8,509.94

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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.