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Finding the Fourth Proportional to 20,486.76, 30,730.50 and 8,800.20

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Solution

The fourth proportional to 20,486.76, 30,730.50 and 8,800.20 is: 13,200.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.76 : 30,730.50 = 8,800.20 : x
  2. Step 2: Convert to fraction form
    20,486.76/30,730.50 = 8,800.20/x
  3. Step 3: Cross multiply
    20,486.76x = 30,730.50 × 8,800.20
  4. Step 4: Simplify right side
    20,486.76x = 270,434,546.10
  5. Step 5: Solve for x
    x = 270,434,546.10/20,486.76
  6. Step 6: Final answer
    x = 13,200.45

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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.