Home / 21,489.55-29,654.09-11,928.69

Finding the Fourth Proportional to 21,489.55, 29,654.09 and 11,928.69

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Solution

The fourth proportional to 21,489.55, 29,654.09 and 11,928.69 is: 16,460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.55 : 29,654.09 = 11,928.69 : x
  2. Step 2: Convert to fraction form
    21,489.55/29,654.09 = 11,928.69/x
  3. Step 3: Cross multiply
    21,489.55x = 29,654.09 × 11,928.69
  4. Step 4: Simplify right side
    21,489.55x = 353,734,446.84
  5. Step 5: Solve for x
    x = 353,734,446.84/21,489.55
  6. Step 6: Final answer
    x = 16,460.77

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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.