Home / 19,687.88-27,169.28-12,623.87

Finding the Fourth Proportional to 19,687.88, 27,169.28 and 12,623.87

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Solution

The fourth proportional to 19,687.88, 27,169.28 and 12,623.87 is: 17,420.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,687.88 : 27,169.28 = 12,623.87 : x
  2. Step 2: Convert to fraction form
    19,687.88/27,169.28 = 12,623.87/x
  3. Step 3: Cross multiply
    19,687.88x = 27,169.28 × 12,623.87
  4. Step 4: Simplify right side
    19,687.88x = 342,981,259.75
  5. Step 5: Solve for x
    x = 342,981,259.75/19,687.88
  6. Step 6: Final answer
    x = 17,420.94

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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.