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Finding the Fourth Proportional to 20,446.68, 30,670.63 and 5,656.69

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Solution

The fourth proportional to 20,446.68, 30,670.63 and 5,656.69 is: 8,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,446.68 : 30,670.63 = 5,656.69 : x
  2. Step 2: Convert to fraction form
    20,446.68/30,670.63 = 5,656.69/x
  3. Step 3: Cross multiply
    20,446.68x = 30,670.63 × 5,656.69
  4. Step 4: Simplify right side
    20,446.68x = 173,494,155.20
  5. Step 5: Solve for x
    x = 173,494,155.20/20,446.68
  6. Step 6: Final answer
    x = 8,485.20

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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.