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Finding the Fourth Proportional to 20,323.71, 30,415.50 and 12,422.16

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Solution

The fourth proportional to 20,323.71, 30,415.50 and 12,422.16 is: 18,590.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,323.71 : 30,415.50 = 12,422.16 : x
  2. Step 2: Convert to fraction form
    20,323.71/30,415.50 = 12,422.16/x
  3. Step 3: Cross multiply
    20,323.71x = 30,415.50 × 12,422.16
  4. Step 4: Simplify right side
    20,323.71x = 377,826,207.48
  5. Step 5: Solve for x
    x = 377,826,207.48/20,323.71
  6. Step 6: Final answer
    x = 18,590.42

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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.