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Finding the Fourth Proportional to 27,200.20, 40,800.30 and 18,905.80

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Solution

The fourth proportional to 27,200.20, 40,800.30 and 18,905.80 is: 28,358.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,200.20 : 40,800.30 = 18,905.80 : x
  2. Step 2: Convert to fraction form
    27,200.20/40,800.30 = 18,905.80/x
  3. Step 3: Cross multiply
    27,200.20x = 40,800.30 × 18,905.80
  4. Step 4: Simplify right side
    27,200.20x = 771,362,311.74
  5. Step 5: Solve for x
    x = 771,362,311.74/27,200.20
  6. Step 6: Final answer
    x = 28,358.70

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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.