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Finding the Fourth Proportional to 21,391.99, 29,529.18 and 19,149.91

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Solution

The fourth proportional to 21,391.99, 29,529.18 and 19,149.91 is: 26,434.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.99 : 29,529.18 = 19,149.91 : x
  2. Step 2: Convert to fraction form
    21,391.99/29,529.18 = 19,149.91/x
  3. Step 3: Cross multiply
    21,391.99x = 29,529.18 × 19,149.91
  4. Step 4: Simplify right side
    21,391.99x = 565,481,139.37
  5. Step 5: Solve for x
    x = 565,481,139.37/21,391.99
  6. Step 6: Final answer
    x = 26,434.25

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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.