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Finding the Fourth Proportional to 20,333.56, 30,489.08 and 6,289.72

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Solution

The fourth proportional to 20,333.56, 30,489.08 and 6,289.72 is: 9,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,333.56 : 30,489.08 = 6,289.72 : x
  2. Step 2: Convert to fraction form
    20,333.56/30,489.08 = 6,289.72/x
  3. Step 3: Cross multiply
    20,333.56x = 30,489.08 × 6,289.72
  4. Step 4: Simplify right side
    20,333.56x = 191,767,776.26
  5. Step 5: Solve for x
    x = 191,767,776.26/20,333.56
  6. Step 6: Final answer
    x = 9,431.10

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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.