Home / 21,455.20-29,606.56-12,021.94

Finding the Fourth Proportional to 21,455.20, 29,606.56 and 12,021.94

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Solution

The fourth proportional to 21,455.20, 29,606.56 and 12,021.94 is: 16,589.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.20 : 29,606.56 = 12,021.94 : x
  2. Step 2: Convert to fraction form
    21,455.20/29,606.56 = 12,021.94/x
  3. Step 3: Cross multiply
    21,455.20x = 29,606.56 × 12,021.94
  4. Step 4: Simplify right side
    21,455.20x = 355,928,287.93
  5. Step 5: Solve for x
    x = 355,928,287.93/21,455.20
  6. Step 6: Final answer
    x = 16,589.37

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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.