Home / 21,633.62-29,854.78-12,687.57

Finding the Fourth Proportional to 21,633.62, 29,854.78 and 12,687.57

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Solution

The fourth proportional to 21,633.62, 29,854.78 and 12,687.57 is: 17,509.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,633.62 : 29,854.78 = 12,687.57 : x
  2. Step 2: Convert to fraction form
    21,633.62/29,854.78 = 12,687.57/x
  3. Step 3: Cross multiply
    21,633.62x = 29,854.78 × 12,687.57
  4. Step 4: Simplify right side
    21,633.62x = 378,784,579.37
  5. Step 5: Solve for x
    x = 378,784,579.37/21,633.62
  6. Step 6: Final answer
    x = 17,509.07

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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.