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Finding the Fourth Proportional to 19,695.99, 27,190.49 and 15,209.67

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Solution

The fourth proportional to 19,695.99, 27,190.49 and 15,209.67 is: 20,997.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,695.99 : 27,190.49 = 15,209.67 : x
  2. Step 2: Convert to fraction form
    19,695.99/27,190.49 = 15,209.67/x
  3. Step 3: Cross multiply
    19,695.99x = 27,190.49 × 15,209.67
  4. Step 4: Simplify right side
    19,695.99x = 413,558,380.04
  5. Step 5: Solve for x
    x = 413,558,380.04/19,695.99
  6. Step 6: Final answer
    x = 20,997.09

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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.