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Finding the Fourth Proportional to 20,531.80, 30,797.70 and 14,626.90

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Solution

The fourth proportional to 20,531.80, 30,797.70 and 14,626.90 is: 21,940.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.80 : 30,797.70 = 14,626.90 : x
  2. Step 2: Convert to fraction form
    20,531.80/30,797.70 = 14,626.90/x
  3. Step 3: Cross multiply
    20,531.80x = 30,797.70 × 14,626.90
  4. Step 4: Simplify right side
    20,531.80x = 450,474,878.13
  5. Step 5: Solve for x
    x = 450,474,878.13/20,531.80
  6. Step 6: Final answer
    x = 21,940.35

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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.