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Finding the Fourth Proportional to 21,375.99, 29,507.10 and 19,133.91

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Solution

The fourth proportional to 21,375.99, 29,507.10 and 19,133.91 is: 26,412.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,375.99 : 29,507.10 = 19,133.91 : x
  2. Step 2: Convert to fraction form
    21,375.99/29,507.10 = 19,133.91/x
  3. Step 3: Cross multiply
    21,375.99x = 29,507.10 × 19,133.91
  4. Step 4: Simplify right side
    21,375.99x = 564,586,195.76
  5. Step 5: Solve for x
    x = 564,586,195.76/21,375.99
  6. Step 6: Final answer
    x = 26,412.17

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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.