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Finding the Fourth Proportional to 12,647.87, 18,971.80 and 4,327.95

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Solution

The fourth proportional to 12,647.87, 18,971.80 and 4,327.95 is: 6,491.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.87 : 18,971.80 = 4,327.95 : x
  2. Step 2: Convert to fraction form
    12,647.87/18,971.80 = 4,327.95/x
  3. Step 3: Cross multiply
    12,647.87x = 18,971.80 × 4,327.95
  4. Step 4: Simplify right side
    12,647.87x = 82,108,990.99
  5. Step 5: Solve for x
    x = 82,108,990.99/12,647.87
  6. Step 6: Final answer
    x = 6,491.93

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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.