Home / 21,375.62-29,471.36-13,809.14

Finding the Fourth Proportional to 21,375.62, 29,471.36 and 13,809.14

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Solution

The fourth proportional to 21,375.62, 29,471.36 and 13,809.14 is: 19,039.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,375.62 : 29,471.36 = 13,809.14 : x
  2. Step 2: Convert to fraction form
    21,375.62/29,471.36 = 13,809.14/x
  3. Step 3: Cross multiply
    21,375.62x = 29,471.36 × 13,809.14
  4. Step 4: Simplify right side
    21,375.62x = 406,974,136.23
  5. Step 5: Solve for x
    x = 406,974,136.23/21,375.62
  6. Step 6: Final answer
    x = 19,039.17

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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.