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Finding the Fourth Proportional to 21,245.87, 29,317.87 and 12,171.26

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Solution

The fourth proportional to 21,245.87, 29,317.87 and 12,171.26 is: 16,795.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.87 : 29,317.87 = 12,171.26 : x
  2. Step 2: Convert to fraction form
    21,245.87/29,317.87 = 12,171.26/x
  3. Step 3: Cross multiply
    21,245.87x = 29,317.87 × 12,171.26
  4. Step 4: Simplify right side
    21,245.87x = 356,835,438.46
  5. Step 5: Solve for x
    x = 356,835,438.46/21,245.87
  6. Step 6: Final answer
    x = 16,795.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.