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Finding the Fourth Proportional to 20,360.88, 30,550.50 and 12,963.42

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Solution

The fourth proportional to 20,360.88, 30,550.50 and 12,963.42 is: 19,450.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,360.88 : 30,550.50 = 12,963.42 : x
  2. Step 2: Convert to fraction form
    20,360.88/30,550.50 = 12,963.42/x
  3. Step 3: Cross multiply
    20,360.88x = 30,550.50 × 12,963.42
  4. Step 4: Simplify right side
    20,360.88x = 396,038,962.71
  5. Step 5: Solve for x
    x = 396,038,962.71/20,360.88
  6. Step 6: Final answer
    x = 19,450.97

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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.