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Finding the Fourth Proportional to 20,471.57, 30,717.06 and 6,620.57

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Solution

The fourth proportional to 20,471.57, 30,717.06 and 6,620.57 is: 9,933.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.57 : 30,717.06 = 6,620.57 : x
  2. Step 2: Convert to fraction form
    20,471.57/30,717.06 = 6,620.57/x
  3. Step 3: Cross multiply
    20,471.57x = 30,717.06 × 6,620.57
  4. Step 4: Simplify right side
    20,471.57x = 203,364,445.92
  5. Step 5: Solve for x
    x = 203,364,445.92/20,471.57
  6. Step 6: Final answer
    x = 9,933.99

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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.