Home / 21,291.87-29,383.58-11,861.04

Finding the Fourth Proportional to 21,291.87, 29,383.58 and 11,861.04

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Solution

The fourth proportional to 21,291.87, 29,383.58 and 11,861.04 is: 16,368.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.87 : 29,383.58 = 11,861.04 : x
  2. Step 2: Convert to fraction form
    21,291.87/29,383.58 = 11,861.04/x
  3. Step 3: Cross multiply
    21,291.87x = 29,383.58 × 11,861.04
  4. Step 4: Simplify right side
    21,291.87x = 348,519,817.72
  5. Step 5: Solve for x
    x = 348,519,817.72/21,291.87
  6. Step 6: Final answer
    x = 16,368.68

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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.