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Finding the Fourth Proportional to 20,501.76, 30,751.68 and 6,650.88

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Solution

The fourth proportional to 20,501.76, 30,751.68 and 6,650.88 is: 9,976.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,501.76 : 30,751.68 = 6,650.88 : x
  2. Step 2: Convert to fraction form
    20,501.76/30,751.68 = 6,650.88/x
  3. Step 3: Cross multiply
    20,501.76x = 30,751.68 × 6,650.88
  4. Step 4: Simplify right side
    20,501.76x = 204,525,733.48
  5. Step 5: Solve for x
    x = 204,525,733.48/20,501.76
  6. Step 6: Final answer
    x = 9,976.01

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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.