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Finding the Fourth Proportional to 20,158.80, 30,226.20 and 12,373.20

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Solution

The fourth proportional to 20,158.80, 30,226.20 and 12,373.20 is: 18,552.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.80 : 30,226.20 = 12,373.20 : x
  2. Step 2: Convert to fraction form
    20,158.80/30,226.20 = 12,373.20/x
  3. Step 3: Cross multiply
    20,158.80x = 30,226.20 × 12,373.20
  4. Step 4: Simplify right side
    20,158.80x = 373,994,817.84
  5. Step 5: Solve for x
    x = 373,994,817.84/20,158.80
  6. Step 6: Final answer
    x = 18,552.43

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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.