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Finding the Fourth Proportional to 20,657.76, 30,983.20 and 9,563.52

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Solution

The fourth proportional to 20,657.76, 30,983.20 and 9,563.52 is: 14,343.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.76 : 30,983.20 = 9,563.52 : x
  2. Step 2: Convert to fraction form
    20,657.76/30,983.20 = 9,563.52/x
  3. Step 3: Cross multiply
    20,657.76x = 30,983.20 × 9,563.52
  4. Step 4: Simplify right side
    20,657.76x = 296,308,452.86
  5. Step 5: Solve for x
    x = 296,308,452.86/20,657.76
  6. Step 6: Final answer
    x = 14,343.69

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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.