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Finding the Fourth Proportional to 20,368.72, 30,555 and 6,328.90

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Solution

The fourth proportional to 20,368.72, 30,555 and 6,328.90 is: 9,493.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.72 : 30,555 = 6,328.90 : x
  2. Step 2: Convert to fraction form
    20,368.72/30,555 = 6,328.90/x
  3. Step 3: Cross multiply
    20,368.72x = 30,555 × 6,328.90
  4. Step 4: Simplify right side
    20,368.72x = 193,379,539.50
  5. Step 5: Solve for x
    x = 193,379,539.50/20,368.72
  6. Step 6: Final answer
    x = 9,493.95

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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.