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Finding the Fourth Proportional to 20,197.20, 30,295.80 and 13,976.40

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Solution

The fourth proportional to 20,197.20, 30,295.80 and 13,976.40 is: 20,964.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,197.20 : 30,295.80 = 13,976.40 : x
  2. Step 2: Convert to fraction form
    20,197.20/30,295.80 = 13,976.40/x
  3. Step 3: Cross multiply
    20,197.20x = 30,295.80 × 13,976.40
  4. Step 4: Simplify right side
    20,197.20x = 423,426,219.12
  5. Step 5: Solve for x
    x = 423,426,219.12/20,197.20
  6. Step 6: Final answer
    x = 20,964.60

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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.