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Finding the Fourth Proportional to 19,719.99, 27,223.16 and 12,658.41

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Solution

The fourth proportional to 19,719.99, 27,223.16 and 12,658.41 is: 17,474.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719.99 : 27,223.16 = 12,658.41 : x
  2. Step 2: Convert to fraction form
    19,719.99/27,223.16 = 12,658.41/x
  3. Step 3: Cross multiply
    19,719.99x = 27,223.16 × 12,658.41
  4. Step 4: Simplify right side
    19,719.99x = 344,601,857.48
  5. Step 5: Solve for x
    x = 344,601,857.48/19,719.99
  6. Step 6: Final answer
    x = 17,474.75

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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.